{"id":"CVE-2026-56822","aliases":["CLSA-2026-1787045999","CLSA-2026-1787049848","CLSA-2026-1787271464","CLSA-2026-1787301097","CLSA-2026-1787306632","CLSA-2026-1787309634","CLSA-2026-1787331164","CLSA-2026-1787333890","CLSA-2026-1787383378","CLSA-2026-1787397404","DEBIAN-CVE-2026-56822","EUVD-2026-50091","GHSA-wc96-39fc-566f","GHSA-xpw8-rcwv-8f8p","RHLW-2026-7e27d228834c9346","ROOT-APP-MAVEN-GHSA-xpw8-rcwv-8f8p","SUSE-SU-2026:3482-1","UBUNTU-CVE-2026-56822","openSUSE-SU-2026:11394-1"],"status":"published","title":"Netty: TOCTOU in OcspServerCertificateValidator","description":"Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the OcspServerCertificateValidator forwards the SslHandshakeCompletionEvent before the asynchronous OCSP validation completes. This allows the client's downstream handlers to send sensitive application data (e.g., HTTP requests) to a revoked server before the channel is closed by the OCSP check. n io.netty.handler.ssl.ocsp.OcspServerCertificateValidator#userEventTriggered, when an SslHandshakeCompletionEvent is received, the validator immediately calls ctx.fireUserEventTriggered(evt). It then initiates an asynchronous OCSP query using OcspClient.query. Because the handshake completion event is forwarded immediately, downstream handlers in the client's pipeline are notified that the TLS handshake is successful. They may then begin reading and processing incoming application data or sending outgoing data. If the OCSP response later indicates the server's certificate is REVOKED, the validator closes the channel, but by this time, the client may have already leaked sensitive data to a revoked server or processed malicious responses from it. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00173,"percentile":0.06864,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-367","CWE-400"],"published":"2023-10-10T22:22:54Z","modified":"2026-11-10T19:58:30Z","fixes":[{"ecosystem":"Maven","package":"io.netty:netty-handler-ssl-ocsp","fixed_in":["4.2.16.Final","4.1.136.Final"],"sources":["ghsa","osv"]},{"ecosystem":"Maven","package":"io.netty:netty-codec-http2","fixed_in":["4.1.100.Final"],"sources":["ghsa","osv"]},{"ecosystem":"Root:Maven","package":"io.root.io.netty:netty-codec-http2","fixed_in":["4.1.97.Final-root.io.1","4.1.97.Final-root.io.2","4.1.97.Final-root.io.3","4.1.97.Final-root.io.4","4.1.97.Final-root.io.5","4.1.97.Final-root.io.6","4.1.97.Final-root.io.7"],"sources":["osv"]},{"ecosystem":"Root:Maven","package":"io.netty:netty-codec-http2","fixed_in":["4.1.97.Final-aikido.7"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"io.netty:netty-handler-ssl-ocsp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2.0.Final"},{"fixed":"4.2.16.Final"}]}]},{"source":"ghsa","ecosystem":"Maven","package":"io.netty:netty-handler-ssl-ocsp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.136.Final"}]}]},{"source":"ghsa","ecosystem":"Maven","package":"io.netty:netty-codec-http2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.100.Final"}]}]},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-all","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-bom","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-buffer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec-dns","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec-haproxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec-http","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec-http2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec-memcache","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec-mqtt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec-redis","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec-smtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec-socks","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec-stomp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.135.Final"},{"fixed":"4.1.135.Final-tuxcare.1"}]}],"versions":["4.1.135.Final"],"bundled":21},{"source":"osv","ecosystem":"TuxCare:Maven","package":"io.netty:netty-codec-xml","ranges":[{"type":"E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Advisory","advisory","web","report"]},{"url":"https://github.com/netty/netty/releases/tag/netty-4.1.136.Final","tags":["web"]},{"url":"https://github.com/netty/netty/releases/tag/netty-4.2.16.Final","tags":["web"]},{"url":"https://github.com/advisories/GHSA-wc96-39fc-566f","tags":["advisory"]},{"url":"https://github.com/netty/netty/security/advisories/GHSA-xpw8-rcwv-8f8p","tags":["web"]},{"url":"https://github.com/netty/netty/commit/58f75f665aa81a8cbcf6ffa74820042a285c5e61","tags":["web"]},{"url":"https://github.com/apple/swift-nio-http2/security/advisories/GHSA-qppj-fm5r-hxr3","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-44487","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-44487","tags":["web"]},{"url":"https://github.com/advisories/GHSA-xpw8-rcwv-8f8p"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56822.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56822","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-56822","tags":["advisory"]},{"url":"https://github.com/netty/netty","tags":["package"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56820.json","tags":["advisory"]},{"url":"https://github.com/netty/netty/security/advisories/GHSA-272m-gcwp-mpwg","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56820","tags":["advisory"]},{"url":"https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b","tags":["fix"]},{"url":"https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6","tags":["fix"]},{"url":"https://github.com/advisories/GHSA-272m-gcwp-mpwg","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56821.json","tags":["advisory"]},{"url":"https://github.com/netty/netty/security/advisories/GHSA-g7hg-vrcf-mvmr","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56821","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-g7hg-vrcf-mvmr","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20263482-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1271435","tags":["report"]},{"url":"https://bugzilla.suse.com/1271960","tags":["report"]},{"url":"https://bugzilla.suse.com/1271961","tags":["report"]},{"url":"https://bugzilla.suse.com/1272253","tags":["report"]},{"url":"https://bugzilla.suse.com/1272254","tags":["report"]},{"url":"https://bugzilla.suse.com/1272255","tags":["report"]},{"url":"https://bugzilla.suse.com/1272257","tags":["report"]},{"url":"https://bugzilla.suse.com/1272258","tags":["report"]},{"url":"https://bugzilla.suse.com/1272259","tags":["report"]},{"url":"https://bugzilla.suse.com/1272299","tags":["report"]},{"url":"https://bugzilla.suse.com/1272300","tags":["report"]},{"url":"https://bugzilla.suse.com/1272301","tags":["report"]},{"url":"https://bugzilla.suse.com/1272302","tags":["report"]},{"url":"https://bugzilla.suse.com/1272303","tags":["report"]},{"url":"https://bugzilla.suse.com/1272304","tags":["report"]},{"url":"https://bugzilla.suse.com/1272305","tags":["report"]},{"url":"https://bugzilla.suse.com/1272306","tags":["report"]},{"url":"https://bugzilla.suse.com/1272307","tags":["report"]},{"url":"https://bugzilla.suse.com/1272518","tags":["report"]},{"url":"https://bugzilla.suse.com/1272519","tags":["report"]},{"url":"https://bugzilla.suse.com/1272603","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-44891","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-55831","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-55833","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-55851","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56745","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56746","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56817","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56818","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56819","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56820","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56821","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-56822","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59898","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59899","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59900","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59901","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59919","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59920","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-59921","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2026-56822","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-56822","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-56822","title":"Netty: TOCTOU in OcspServerCertificateValidator","description":"Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the OcspServerCertificateValidator forwards the SslHandshakeCompletionEvent before the asynchronous OCSP validation completes. This allows the client's downstream handlers to send sensitive application data (e.g., HTTP requests) to a revoked server before the channel is closed by the OCSP check. n io.netty.handler.ssl.ocsp.OcspServerCertificateValidator#userEventTriggered, when an SslHandshakeCompletionEvent is received, the validator immediately calls ctx.fireUserEventTriggered(evt). It then initiates an asynchronous OCSP query using OcspClient.query. Because the handshake completion event is forwarded immediately, downstream handlers in the client's pipeline are notified that the TLS handshake is successful. They may then begin reading and processing incoming application data or sending outgoing data. If the OCSP response later indicates the server's certificate is REVOKED, the validator closes the channel, but by this time, the client may have already leaked sensitive data to a revoked server or processed malicious responses from it. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.","status":"published","published":"2026-07-28T23:17:17.325Z","modified":"2026-07-30T03:55:17.891Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T13:37:02.780526Z"}],"euvd":[{"id":"EUVD-2026-50091","description":"Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the OcspServerCertificateValidator forwards the SslHandshakeCompletionEvent before the asynchronous OCSP validation completes. This allows the client's downstream handlers to send sensitive application data (e.g., HTTP requests) to a revoked server before the channel is closed by the OCSP check. n io.netty.handler.ssl.ocsp.OcspServerCertificateValidator#userEventTriggered, when an SslHandshakeCompletionEvent is received, the validator immediately calls ctx.fireUserEventTriggered(evt). It then initiates an asynchronous OCSP query using OcspClient.query. Because the handshake completion event is forwarded immediately, downstream handlers in the client's pipeline are notified that the TLS handshake is successful. They may then begin reading and processing incoming application data or sending outgoing data. If the OCSP response later indicates the server's certificate is REVOKED, the validator closes the channel, but by this time, the client may have already leaked sensitive data to a revoked server or processed malicious responses from it. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.","status":"published","published":"2026-07-28T23:17:17Z","modified":"2026-07-30T03:55:17Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T18:02:29.367786Z"}],"ghsa":[{"id":"GHSA-wc96-39fc-566f","title":"Netty: TOCTOU in OcspServerCertificateValidator","description":"### Summary\nNetty's OcspServerCertificateValidator forwards the SslHandshakeCompletionEvent before the asynchronous OCSP validation completes. This allows the client's downstream handlers to send sensitive application data (e.g., HTTP requests) to a revoked server before the channel is closed by the OCSP check.\n\n### Details\nIn `io.netty.handler.ssl.ocsp.OcspServerCertificateValidator#userEventTriggered`, when an `SslHandshakeCompletionEvent` is received, the validator immediately calls `ctx.fireUserEventTriggered(evt)`. It then initiates an asynchronous OCSP query using `OcspClient.query`.\n\nBecause the handshake completion event is forwarded immediately, downstream handlers in the client's pipeline are notified that the TLS handshake is successful. They may then begin reading and processing incoming application data or sending outgoing data. If the OCSP response later indicates the server's certificate is REVOKED, the validator closes the channel, but by this time, the client may have already leaked sensitive data to a revoked server or processed malicious responses from it.\n\n### PoC\n\n```java\n    @Test\n    public void test() throws Exception {\n        EventLoopGroup group = new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());\n        try {\n            OCSPRespBuilder respBuilder = new OCSPRespBuilder();\n            OCSPResp response = respBuilder.build(OCSPRespBuilder.INTERNAL_ERROR, null);\n            byte[] responseEncoded = response.getEncoded();\n\n            IoTransport mockTransport = IoTransport.create(group.next(), () -\u003e {\n                NioSocketChannel channel = new NioSocketChannel();\n                channel.pipeline().addFirst(new ChannelOutboundHandlerAdapter() {\n                    @Override\n                    public void connect(ChannelHandlerContext ctx, SocketAddress remoteAddress, SocketAddress localAddress, ChannelPromise promise) {\n                        promise.setSuccess();\n\n                        ctx.executor().schedule(() -\u003e {\n                            ctx.pipeline().fireChannelActive();\n\n                            DefaultFullHttpResponse httpResponse = new DefaultFullHttpResponse(\n                                    HttpVersion.HTTP_1_1, HttpResponseStatus.OK, Unpooled.wrappedBuffer(responseEncoded));\n                            httpResponse.headers().set(HttpHeaderNames.CONTENT_TYPE, \"application/ocsp-response\");\n                            httpResponse.headers().set(HttpHeaderNames.CONTENT_LENGTH, httpResponse.content().readableBytes());\n\n                            ctx.pipeline().fireChannelRead(httpResponse);\n                        }, 500, TimeUnit.MILLISECONDS);\n                    }\n                });\n                return channel;\n            }, NioDatagramChannel::new);\n\n            X509Bundle caRoot = new CertificateBuilder()\n                    .algorithm(CertificateBuilder.Algorithm.rsa2048)\n                    .subject(\"CN=TrustedRootCA\")\n                    .setIsCertificateAuthority(true)\n                    .buildSelfSigned();\n\n            GeneralName ocspName = new GeneralName(GeneralName.uniformResourceIdentifier, \"http://localhost/\");\n            AuthorityInformationAccess aia = new AuthorityInformationAccess(new AccessDescription(AccessDescription.id_ad_ocsp, ocspName));\n            X509Bundle targetCert = new CertificateBuilder()\n                    .algorithm(CertificateBuilder.Algorithm.rsa2048)\n                    .subject(\"CN=TargetServer\")\n                    .addExtensionOctetString(\"1.3.6.1.5.5.7.1.1\", false, aia.getEncoded())\n                    .buildIssuedBy(caRoot);\n\n            SslContext serverSslCtx = SslContextBuilder.forServer(targetCert.getKeyPair().getPrivate(), targetCert.getCertificate()).build();\n\n            CopyOnWriteArrayList\u003cString\u003e receivedData = new CopyOnWriteArrayList\u003c\u003e();\n            CountDownLatch dataReceivedLatch = new CountDownLatch(1);\n\n            new ServerBootstrap()\n                    .group(group)\n                    .channel(NioServerSocketChannel.class)\n                    .childHandler(new ChannelInitializer\u003cSocketChannel\u003e() {\n                        @Override\n                        protected void initChannel(SocketChannel ch) {\n                            ch.pipeline().addLast(serverSslCtx.newHandler(ch.alloc()));\n                            ch.pipeline().addLast(new SimpleChannelInboundHandler\u003cByteBuf\u003e() {\n                                @Override\n                                protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) {\n                                    receivedData.add(msg.toString(CharsetUtil.UTF_8));\n                                    dataReceivedLatch.countDown();\n                                }\n                            });\n                        }\n                    })\n                    .bind(8080)\n                    .sync()\n                    .channel();\n\n            SslContext clientSslCtx = SslContextBuilder.forClient()\n                    .trustManager(InsecureTrustManagerFactory.INSTANCE)\n                    .build();\n\n            DnsNameResolver resolver = OcspServerCertificateValidator.createDefaultResolver(mockTransport);\n            Channel clientChannel = new Bootstrap()\n                    .group(group)\n                    .channel(NioSocketChannel.class)\n                    .handler(new ChannelInitializer\u003cSocketChannel\u003e() {\n                        @Override\n                        protected void initChannel(SocketChannel ch) {\n                            ch.pipeline().addLast(clientSslCtx.newHandler(ch.alloc(), \"127.0.0.1\", 8080));\n                            ch.pipeline().addLast(new OcspServerCertificateValidator(true, false, mockTransport, resolver));\n                            ch.pipeline().addLast(new ChannelInboundHandlerAdapter() {\n                                @Override\n                                public void userEventTriggered(ChannelHandlerContext ctx, Object evt) {\n                                    if (evt instanceof SslHandshakeCompletionEvent) {\n                                        SslHandshakeCompletionEvent sslEvent = (SslHandshakeCompletionEvent) evt;\n                                        if (sslEvent.isSuccess()) {\n                                            ctx.writeAndFlush(Unpooled.copiedBuffer(\"SECRET_DATA\", CharsetUtil.UTF_8));\n                                        }\n                                    }\n                                    ctx.fireUserEventTriggered(evt);\n                                }\n                            });\n                        }\n                    })\n                    .connect(\"127.0.0.1\", 8080)\n                    .sync()\n                    .channel();\n\n            assertTrue(clientChannel.closeFuture().await(5, TimeUnit.SECONDS));\n\n            Thread.sleep(200);\n\n            assertFalse(receivedData.contains(\"SECRET_DATA\"), \"Server should not receive the data.\");\n        } finally {\n            group.shutdownGracefully();\n        }\n    }\n```\n\n### Impact\nTOCTOU. Client applications relying on OcspServerCertificateValidator to enforce server certificate revocation are impacted. A malicious server with a revoked certificate can successfully establish a TLS connection and receive sensitive application data from the client (or send malicious data to it) during the window between the TLS handshake completing and the asynchronous OCSP check failing.","status":"published","published":"2026-07-22T21:47:41Z","modified":"2026-07-22T21:47:43Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:40:51.375752Z"},{"id":"GHSA-xpw8-rcwv-8f8p","title":"io.netty:netty-codec-http2 vulnerable to HTTP/2 Rapid Reset Attack","description":"A client might overload the server by issue frequent RST frames. This can cause a massive amount of load on the remote system and so cause a DDOS attack. \n\n### Impact\nThis is a DDOS attack, any http2 server is affected and so you should update as soon as possible.\n\n### Patches\nThis is patched in version 4.1.100.Final.\n\n### Workarounds\nA user can limit the amount of RST frames that are accepted per connection over a timeframe manually using either an own `Http2FrameListener` implementation or an `ChannelInboundHandler` implementation (depending which http2 API is used).\n\n### References\n- https://www.cve.org/CVERecord?id=CVE-2023-44487\n- https://blog.cloudflare.com/technical-breakdown-http2-rapid-reset-ddos-attack/\n- https://cloud.google.com/blog/products/identity-security/google-cloud-mitigated-largest-ddos-attack-peaking-above-398-million-rps/","status":"published","published":"2023-10-10T22:22:54Z","modified":"2023-11-06T22:08:37Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:37:15.055009Z"}],"nvd":[{"id":"CVE-2026-56822","description":"Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the OcspServerCertificateValidator forwards the SslHandshakeCompletionEvent before the asynchronous OCSP validation completes. This allows the client's downstream handlers to send sensitive application data (e.g., HTTP requests) to a revoked server before the channel is closed by the OCSP check. n io.netty.handler.ssl.ocsp.OcspServerCertificateValidator#userEventTriggered, when an SslHandshakeCompletionEvent is received, the validator immediately calls ctx.fireUserEventTriggered(evt). It then initiates an asynchronous OCSP query using OcspClient.query. Because the handshake completion event is forwarded immediately, downstream handlers in the client's pipeline are notified that the TLS handshake is successful. They may then begin reading and processing incoming application data or sending outgoing data. If the OCSP response later indicates the server's certificate is REVOKED, the validator closes the channel, but by this time, the client may have already leaked sensitive data to a revoked server or processed malicious responses from it. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.","status":"published","published":"2026-07-29T00:16:38.717Z","modified":"2026-08-07T15:05:31.17Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:12:33.629616Z"}],"osv":[{"id":"CVE-2026-56822","title":"Netty: TOCTOU in OcspServerCertificateValidator","description":"Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the OcspServerCertificateValidator forwards the SslHandshakeCompletionEvent before the asynchronous OCSP validation completes. This allows the client's downstream handlers to send sensitive application data (e.g., HTTP requests) to a revoked server before the channel is closed by the OCSP check. n io.netty.handler.ssl.ocsp.OcspServerCertificateValidator#userEventTriggered, when an SslHandshakeCompletionEvent is received, the validator immediately calls ctx.fireUserEventTriggered(evt). It then initiates an asynchronous OCSP query using OcspClient.query. Because the handshake completion event is forwarded immediately, downstream handlers in the client's pipeline are notified that the TLS handshake is successful. They may then begin reading and processing incoming application data or sending outgoing data. If the OCSP response later indicates the server's certificate is REVOKED, the validator closes the channel, but by this time, the client may have already leaked sensitive data to a revoked server or processed malicious responses from it. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.","status":"published","published":"2026-07-28T23:17:17.325Z","modified":"2026-10-28T02:31:01.323083998Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T15:45:12.016252Z"},{"id":"DEBIAN-CVE-2026-56822","description":"Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the OcspServerCertificateValidator forwards the SslHandshakeCompletionEvent before the asynchronous OCSP validation completes. This allows the client's downstream handlers to send sensitive application data (e.g., HTTP requests) to a revoked server before the channel is closed by the OCSP check. n io.netty.handler.ssl.ocsp.OcspServerCertificateValidator#userEventTriggered, when an SslHandshakeCompletionEvent is received, the validator immediately calls ctx.fireUserEventTriggered(evt). It then initiates an asynchronous OCSP query using OcspClient.query. Because the handshake completion event is forwarded immediately, downstream handlers in the client's pipeline are notified that the TLS handshake is successful. They may then begin reading and processing incoming application data or sending outgoing data. If the OCSP response later indicates the server's certificate is REVOKED, the validator closes the channel, but by this time, the client may have already leaked sensitive data to a revoked server or processed malicious responses from it. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.","status":"published","published":"2026-07-29T00:16:38.717Z","modified":"2026-10-01T03:03:27.139169666Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:57.590991Z"},{"id":"GHSA-wc96-39fc-566f","title":"Netty: TOCTOU in OcspServerCertificateValidator","description":"### Summary\nNetty's OcspServerCertificateValidator forwards the SslHandshakeCompletionEvent before the asynchronous OCSP validation completes. This allows the client's downstream handlers to send sensitive application data (e.g., HTTP requests) to a revoked server before the channel is closed by the OCSP check.\n\n### Details\nIn `io.netty.handler.ssl.ocsp.OcspServerCertificateValidator#userEventTriggered`, when an `SslHandshakeCompletionEvent` is received, the validator immediately calls `ctx.fireUserEventTriggered(evt)`. It then initiates an asynchronous OCSP query using `OcspClient.query`.\n\nBecause the handshake completion event is forwarded immediately, downstream handlers in the client's pipeline are notified that the TLS handshake is successful. They may then begin reading and processing incoming application data or sending outgoing data. If the OCSP response later indicates the server's certificate is REVOKED, the validator closes the channel, but by this time, the client may have already leaked sensitive data to a revoked server or processed malicious responses from it.\n\n### PoC\n\n```java\n    @Test\n    public void test() throws Exception {\n        EventLoopGroup group = new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());\n        try {\n            OCSPRespBuilder respBuilder = new OCSPRespBuilder();\n            OCSPResp response = respBuilder.build(OCSPRespBuilder.INTERNAL_ERROR, null);\n            byte[] responseEncoded = response.getEncoded();\n\n            IoTransport mockTransport = IoTransport.create(group.next(), () -\u003e {\n                NioSocketChannel channel = new NioSocketChannel();\n                channel.pipeline().addFirst(new ChannelOutboundHandlerAdapter() {\n                    @Override\n                    public void connect(ChannelHandlerContext ctx, SocketAddress remoteAddress, SocketAddress localAddress, ChannelPromise promise) {\n                        promise.setSuccess();\n\n                        ctx.executor().schedule(() -\u003e {\n                            ctx.pipeline().fireChannelActive();\n\n                            DefaultFullHttpResponse httpResponse = new DefaultFullHttpResponse(\n                                    HttpVersion.HTTP_1_1, HttpResponseStatus.OK, Unpooled.wrappedBuffer(responseEncoded));\n                            httpResponse.headers().set(HttpHeaderNames.CONTENT_TYPE, \"application/ocsp-response\");\n                            httpResponse.headers().set(HttpHeaderNames.CONTENT_LENGTH, httpResponse.content().readableBytes());\n\n                            ctx.pipeline().fireChannelRead(httpResponse);\n                        }, 500, TimeUnit.MILLISECONDS);\n                    }\n                });\n                return channel;\n            }, NioDatagramChannel::new);\n\n            X509Bundle caRoot = new CertificateBuilder()\n                    .algorithm(CertificateBuilder.Algorithm.rsa2048)\n                    .subject(\"CN=TrustedRootCA\")\n                    .setIsCertificateAuthority(true)\n                    .buildSelfSigned();\n\n            GeneralName ocspName = new GeneralName(GeneralName.uniformResourceIdentifier, \"http://localhost/\");\n            AuthorityInformationAccess aia = new AuthorityInformationAccess(new AccessDescription(AccessDescription.id_ad_ocsp, ocspName));\n            X509Bundle targetCert = new CertificateBuilder()\n                    .algorithm(CertificateBuilder.Algorithm.rsa2048)\n                    .subject(\"CN=TargetServer\")\n                    .addExtensionOctetString(\"1.3.6.1.5.5.7.1.1\", false, aia.getEncoded())\n                    .buildIssuedBy(caRoot);\n\n            SslContext serverSslCtx = SslContextBuilder.forServer(targetCert.getKeyPair().getPrivate(), targetCert.getCertificate()).build();\n\n            CopyOnWriteArrayList\u003cString\u003e receivedData = new CopyOnWriteArrayList\u003c\u003e();\n            CountDownLatch dataReceivedLatch = new CountDownLatch(1);\n\n            new ServerBootstrap()\n                    .group(group)\n                    .channel(NioServerSocketChannel.class)\n                    .childHandler(new ChannelInitializer\u003cSocketChannel\u003e() {\n                        @Override\n                        protected void initChannel(SocketChannel ch) {\n                            ch.pipeline().addLast(serverSslCtx.newHandler(ch.alloc()));\n                            ch.pipeline().addLast(new SimpleChannelInboundHandler\u003cByteBuf\u003e() {\n                                @Override\n                                protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) {\n                                    receivedData.add(msg.toString(CharsetUtil.UTF_8));\n                                    dataReceivedLatch.countDown();\n                                }\n                            });\n                        }\n                    })\n                    .bind(8080)\n                    .sync()\n                    .channel();\n\n            SslContext clientSslCtx = SslContextBuilder.forClient()\n                    .trustManager(InsecureTrustManagerFactory.INSTANCE)\n                    .build();\n\n            DnsNameResolver resolver = OcspServerCertificateValidator.createDefaultResolver(mockTransport);\n            Channel clientChannel = new Bootstrap()\n                    .group(group)\n                    .channel(NioSocketChannel.class)\n                    .handler(new ChannelInitializer\u003cSocketChannel\u003e() {\n                        @Override\n                        protected void initChannel(SocketChannel ch) {\n                            ch.pipeline().addLast(clientSslCtx.newHandler(ch.alloc(), \"127.0.0.1\", 8080));\n                            ch.pipeline().addLast(new OcspServerCertificateValidator(true, false, mockTransport, resolver));\n                            ch.pipeline().addLast(new ChannelInboundHandlerAdapter() {\n                                @Override\n                                public void userEventTriggered(ChannelHandlerContext ctx, Object evt) {\n                                    if (evt instanceof SslHandshakeCompletionEvent) {\n                                        SslHandshakeCompletionEvent sslEvent = (SslHandshakeCompletionEvent) evt;\n                                        if (sslEvent.isSuccess()) {\n                                            ctx.writeAndFlush(Unpooled.copiedBuffer(\"SECRET_DATA\", CharsetUtil.UTF_8));\n                                        }\n                                    }\n                                    ctx.fireUserEventTriggered(evt);\n                                }\n                            });\n                        }\n                    })\n                    .connect(\"127.0.0.1\", 8080)\n                    .sync()\n                    .channel();\n\n            assertTrue(clientChannel.closeFuture().await(5, TimeUnit.SECONDS));\n\n            Thread.sleep(200);\n\n            assertFalse(receivedData.contains(\"SECRET_DATA\"), \"Server should not receive the data.\");\n        } finally {\n            group.shutdownGracefully();\n        }\n    }\n```\n\n### Impact\nTOCTOU. Client applications relying on OcspServerCertificateValidator to enforce server certificate revocation are impacted. A malicious server with a revoked certificate can successfully establish a TLS connection and receive sensitive application data from the client (or send malicious data to it) during the window between the TLS handshake completing and the asynchronous OCSP check failing.","status":"published","published":"2026-07-22T21:47:41Z","modified":"2026-09-10T03:51:12.489335338Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T15:46:58.401149Z"},{"id":"GHSA-xpw8-rcwv-8f8p","title":"io.netty:netty-codec-http2 vulnerable to HTTP/2 Rapid Reset Attack","description":"A client might overload the server by issue frequent RST frames. This can cause a massive amount of load on the remote system and so cause a DDOS attack. \n\n### Impact\nThis is a DDOS attack, any http2 server is affected and so you should update as soon as possible.\n\n### Patches\nThis is patched in version 4.1.100.Final.\n\n### Workarounds\nA user can limit the amount of RST frames that are accepted per connection over a timeframe manually using either an own `Http2FrameListener` implementation or an `ChannelInboundHandler` implementation (depending which http2 API is used).\n\n### References\n- https://www.cve.org/CVERecord?id=CVE-2023-44487\n- https://blog.cloudflare.com/technical-breakdown-http2-rapid-reset-ddos-attack/\n- https://cloud.google.com/blog/products/identity-security/google-cloud-mitigated-largest-ddos-attack-peaking-above-398-million-rps/","status":"published","published":"2023-10-10T22:22:54Z","modified":"2026-09-10T03:49:58.76078733Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:47:00.198893Z"},{"id":"RHLW-2026-7e27d228834c9346","title":"Lightwell Security Advisory: netty-handler-ssl-ocsp 4.1.100.Final-rhlw-00001","description":"Red Hat Lightwell has released io.netty:netty-handler-ssl-ocsp 4.1.100.Final-rhlw-00001 with backported fixes for CVE-2026-56820, CVE-2026-56821, and CVE-2026-56822.\n\nCVE-2026-56820: Netty: Missing CertificateID Validation in OCSP Response Allows Replay Attacks\n\nCVE-2026-56821: Netty: Out-of-date OCSP Responses Accepted by OcspServerCertificateValidator\n\nCVE-2026-56822: Netty: TOCTOU in OcspServerCertificateValidator\n\nThis patched artifact is a drop-in replacement for io.netty:netty-handler-ssl-ocsp 4.1.100.Final from Maven Central.","status":"published","published":"2026-10-12T16:58:21Z","modified":"2026-10-27T04:00:09.766307059Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:52:58.636919Z"},{"id":"ROOT-APP-MAVEN-GHSA-xpw8-rcwv-8f8p","title":"GHSA-xpw8-rcwv-8f8p in io.root.io.netty:netty-codec-http2 - Patched by Root","description":"Root has patched GHSA-xpw8-rcwv-8f8p in the io.root.io.netty:netty-codec-http2 package for Root:Maven. Multiple fixed versions available.","status":"published","published":"2026-06-18T12:52:23Z","modified":"2026-06-18T18:15:26.175069727Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:27.066589Z"},{"id":"UBUNTU-CVE-2026-56822","description":"Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the OcspServerCertificateValidator forwards the SslHandshakeCompletionEvent before the asynchronous OCSP validation completes. This allows the client's downstream handlers to send sensitive application data (e.g., HTTP requests) to a revoked server before the channel is closed by the OCSP check. n io.netty.handler.ssl.ocsp.OcspServerCertificateValidator#userEventTriggered, when an SslHandshakeCompletionEvent is received, the validator immediately calls ctx.fireUserEventTriggered(evt). It then initiates an asynchronous OCSP query using OcspClient.query. Because the handshake completion event is forwarded immediately, downstream handlers in the client's pipeline are notified that the TLS handshake is successful. They may then begin reading and processing incoming application data or sending outgoing data. If the OCSP response later indicates the server's certificate is REVOKED, the validator closes the channel, but by this time, the client may have already leaked sensitive data to a revoked server or processed malicious responses from it. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.","status":"published","published":"2026-07-29T00:16:00Z","modified":"2026-10-17T12:59:10.853209404Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T16:56:41.382716Z"},{"id":"CLSA-2026-1787045999","title":"TuxCare security update for io.netty (23 CVEs)","description":"TuxCare rebuilt 47 io.netty packages to address 23 CVEs. Fixed in 4.1.135.Final-tuxcare.1.","status":"published","published":"2026-08-18T09:39:59Z","modified":"2026-10-15T09:46:22.118386744Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1787049848","title":"TuxCare security update for io.netty (23 CVEs)","description":"TuxCare rebuilt 47 io.netty packages to address 23 CVEs. Fixed in 4.1.130.Final-tuxcare.3.","status":"published","published":"2026-08-18T10:44:08Z","modified":"2026-10-15T09:46:35.670728434Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1787271464","title":"TuxCare security update for io.netty (59 CVEs)","description":"TuxCare rebuilt 47 io.netty packages to address 59 CVEs. Fixed in 4.1.122.Final-tuxcare.2.","status":"published","published":"2026-08-21T00:17:44Z","modified":"2026-10-15T09:46:34.75643555Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1787301097","title":"TuxCare security update for io.netty (60 CVEs)","description":"TuxCare rebuilt 47 io.netty packages to address 60 CVEs. Fixed in 4.1.119.Final-tuxcare.1.","status":"published","published":"2026-08-21T08:31:37Z","modified":"2026-10-15T09:46:34.967537233Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1787306632","title":"TuxCare security update for io.netty (41 CVEs)","description":"TuxCare rebuilt 47 io.netty packages to address 41 CVEs. Fixed in 4.1.112.Final-tuxcare.6.","status":"published","published":"2026-08-21T10:03:52Z","modified":"2026-10-15T09:46:35.351743786Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1787309634","title":"TuxCare security update for io.netty (62 CVEs)","description":"TuxCare rebuilt 47 io.netty packages to address 62 CVEs. Fixed in 4.1.111.Final-tuxcare.1.","status":"published","published":"2026-08-21T10:53:54Z","modified":"2026-10-15T09:46:34.370885626Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1787331164","title":"TuxCare security update for io.netty (48 CVEs)","description":"TuxCare rebuilt 47 io.netty packages to address 48 CVEs. Fixed in 4.1.117.Final-tuxcare.3.","status":"published","published":"2026-08-21T16:52:44Z","modified":"2026-10-15T09:47:25.558975504Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1787333890","title":"TuxCare security update for io.netty (61 CVEs)","description":"TuxCare rebuilt 47 io.netty packages to address 61 CVEs. Fixed in 4.1.108.Final-tuxcare.1.","status":"published","published":"2026-08-21T17:38:10Z","modified":"2026-10-15T09:47:25.399673043Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1787383378","title":"TuxCare security update for io.netty (61 CVEs)","description":"TuxCare rebuilt 47 io.netty packages to address 61 CVEs. Fixed in 4.1.107.Final-tuxcare.1.","status":"published","published":"2026-08-22T07:22:58Z","modified":"2026-10-15T09:47:25.582500226Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"CLSA-2026-1787397404","title":"TuxCare security update for io.netty (61 CVEs)","description":"TuxCare rebuilt 47 io.netty packages to address 61 CVEs. Fixed in 4.1.94.Final-tuxcare.1.","status":"published","published":"2026-08-22T11:16:44Z","modified":"2026-11-10T19:58:30.506519107Z","updated_at":"2026-11-10T20:07:15.512362Z"},{"id":"openSUSE-SU-2026:11394-1","title":"netty-4.1.136-1.1 on GA media","description":"These are all security issues fixed in the netty-4.1.136-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-07-28T00:00:00Z","modified":"2026-07-29T18:24:26.986451317Z","updated_at":"2026-11-02T16:58:39.516824Z"},{"id":"SUSE-SU-2026:3482-1","title":"Security update for netty, netty-tcnative","description":"This update for netty, netty-tcnative fixes the following issues:\n\nUpgrade netty to upstream version 4.1.136 and netty-tcnative to version 2.0.80 Final.\n\nSecurity issues fixed\n\n- CVE-2026-44891: memory exhaustion in `io.netty:netty-codec-stomp` (bsc#1271435).\n- CVE-2026-55831: resource exhaustion/DoS in `io.netty:netty-codec-http` (bsc#1271960).\n- CVE-2026-55833: zip bomb in `io.netty:netty-codec-http` (bsc#1271961).\n- CVE-2026-55851: memory exhaustion in `io.netty:netty-codec-haproxy` (bsc#1272253).\n- CVE-2026-56745: memory exhaustion in `io.netty:netty-codec-http` (bsc#1272254).\n- CVE-2026-56746: improper access control in `io.netty:netty-codec-http` (CORS) (bsc#1272255).\n- CVE-2026-56817: insecure defaults in XML parsing in `io.netty:netty-codec-xml` (bsc#1272257).\n- CVE-2026-56818: memory leak in `io.netty:netty-codec-redis` (bsc#1272603).\n- CVE-2026-56819: memory leak in `io.netty:netty-codec-http2` (bsc#1272258).\n- CVE-2026-56820: improper certificate validation in `io.netty:netty-handler-ssl-ocsp` (bsc#1272259).\n- CVE-2026-56821: improper certificate revocation check in `io.netty:netty-handler-ssl-ocsp` (bsc#1272299).\n- CVE-2026-56822: time-of-check/time-of-use in `io.netty:netty-handler-ssl-ocsp` (bsc#1272300).\n- CVE-2026-59898: protocol version confusion in `io.netty:netty-codec-http` (websocket) (bsc#1272302).\n- CVE-2026-59899: memory exhaustion in `io.netty:netty-codec-http` (bsc#1272301).\n- CVE-2026-59900: improper header neutralization in `io.netty:netty-codec-http2` (bsc#1272303).\n- CVE-2026-59901: infinite loop in `io.netty:netty-codec-compression` (bzip2) (bsc#1272304).\n- CVE-2026-59919: improper CR/LF neutralization in `io.netty:netty-codec-haproxy` (bsc#1272305).\n- CVE-2026-59920: improper CR/LF neutrolization in `io.netty:netty-codec-stomp` (bsc#1272306).\n- CVE-2026-59921: improper CR/LF neutralization in `io.netty:netty-codec-http` (multipart) (bsc#1272307).\n- Memory leak in `io.netty:netty-codec-dns`  (bsc#1272519).\n- Uncontrolled resource consumption in `io.netty:netty-codec-xml` (bsc#1272518).\n\nOther updates and bugfixes:\n\n- Upgrade to upstream version 4.1.136:\n  + SingleThreadEventExecutor: document Throwable safety contract\n    on run()\n  + Make HTTP/2 frame hashCode consistent with equals\n  + Add BlockHound exception for DnsQueryIdSpace (#16896)\n  + FlowControlHandler: Fix autoRead behavior\n  + Fix incorrect bounds in error message of\n    HpackDecoder.setMaxHeaderListSize\n  + MQTT: Fix MQTT decoder size check after variable header replay\n  + MQTT: Make the decodeProperties early-REPLAY check actually\n    fire\n  + Reject control characters at the boundary of HTTP method names\n    (#16723)\n  + Update to latest tcnative release\n  + Fix HTTP 2 PUSH_PROMISE stream association validation\n  + Fix GZIP FEXTRA extra-field handling in JdkZlibDecoder\n  + Add opt-in validation of mandatory pseudo-header fields for\n    HTTP/2\n  + Strictly validate MQTT UTF-8 Encoded String (#16939)\n  + Stop DateFormatter trailing token from running past the parse\n    end\n  + IpFilter: Deprecate constructor which use accept by default\n  + Add RFC 10008 QUERY Method support (#16966)\n  + Correctly release and fail queued traffic-shaping writes on\n    close (#16959)\n  + FlowControlHandler: respect auto-read when toggled while\n    dequeueing\n  + IdleStateHandler: reset firstWriter/ReaderIdleEvent in\n    resetWriteTimeout/resetReadTimeout (#16982)\n  + Fix typo in AbstractSniHandler Javadoc\n  + Reconcile AbstractCoalescingBufferQueue readableBytes when it\n    drains, and fail stuck HTTP/2 streams instead of spinning\n    empty DATA frames\n  + Reject control characters at the boundary of the HTTP version\n    token (#16971)\n  + Reset UTF-8 decode state on CR in StompSubframeDecoder\n  + HTTP2: Pass the correct number of arguments when logging\n    goaway\n  + FastLz: Guard decompression against truncated input (#17000)\n  + Fix propagation of startTls for client SslContext handler\n  + Reject non-token characters in HTTP/2 header names\n  + Update lz4-java to 1.11.1\n  + Pin github actions to reduce risk (#17043)\n  + Merge branches from forks (#17063)\n","status":"published","published":"2026-08-04T11:46:42Z","modified":"2026-08-05T18:23:51.045558593Z","updated_at":"2026-11-02T15:54:04.987808Z"}]}}