{"id":"CVE-2026-63374","aliases":["CLSA-2026-1790063936","DEBIAN-CVE-2026-63374","EUVD-2026-84522","GHSA-82r6-8w77-94w6","PYSEC-2026-4025","ROOT-APP-PYPI-CVE-2026-63374","SUSE-SU-2026:24122-1","SUSE-SU-2026:24208-1","SUSE-SU-2026:4416-1","UBUNTU-CVE-2026-63374","openSUSE-SU-2026:12324-1","openSUSE-SU-2026:22060-1"],"status":"published","title":"AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing","description":"AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's certificate to validate. This issue is fixed in version 4.14.2.","severity":{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00289,"percentile":0.21726,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-295","CWE-297"],"published":"2026-09-18T17:17:18Z","modified":"2026-10-29T12:27:02Z","fixes":[{"ecosystem":"PyPI","package":"anyio","fixed_in":["4.14.2"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:14","package":"python-anyio","fixed_in":["4.15.1-1"],"sources":["osv"]},{"ecosystem":"Root:PyPI","package":"anyio","fixed_in":["4.14.0+aikido.2","4.13.0+aikido.1","3.7.1+aikido.1","4.12.1+aikido.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"graphifyy","fixed_in":["0.9.97-1.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.2"}]}]},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.7.1"},{"fixed":"3.7.1.post2+tuxcare"}]}],"versions":["3.7.1","3.7.1.post1+tuxcare"],"bundled":2},{"source":"osv","ecosystem":"Debian:12","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.2-1","3.7.0-1","4.1.0-1","4.11.0-1","4.11.0-2","4.11.0-3","4.12.1-1","4.12.1-2","4.12.1-3","4.15.1-1","4.15.1-2","4.15.1-3","4.2.0-1","4.3.0-1","4.4.0-1","4.6.0-1","4.6.2-1","4.6.2-2","4.6.2-3","4.6.2-4","4.7.0-1","4.8.0-1","4.8.0-2","4.8.0-3"]},{"source":"osv","ecosystem":"Debian:13","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.11.0-1","4.11.0-2","4.11.0-3","4.12.1-1","4.12.1-2","4.12.1-3","4.15.1-1","4.15.1-2","4.15.1-3","4.8.0-3"]},{"source":"osv","ecosystem":"Debian:14","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.1-1"}]}],"versions":["4.11.0-1","4.11.0-2","4.11.0-3","4.12.1-1","4.12.1-2","4.12.1-3","4.8.0-3"]},{"source":"osv","ecosystem":"PyPI","package":"anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.2"}]}],"versions":["1.0.0","1.0.0a1","1.0.0a2","1.0.0b1","1.0.0b2","1.0.0rc1","1.0.0rc2","1.1.0","1.2.0","1.2.1","1.2.2","1.2.3","1.3.0","1.3.1","1.4.0","2.0.0","2.0.0b1","2.0.0b2","2.0.0rc1","2.0.0rc2","2.0.1","2.0.2","2.1.0","2.2.0","3.0.0","3.0.0rc1","3.0.0rc2","3.0.0rc3","3.0.0rc4","3.0.1","3.1.0","3.2.0","3.2.1","3.3.0","3.3.1","3.3.2","3.3.3","3.3.4","3.4.0","3.5.0","3.6.0","3.6.1","3.6.2","3.7.0","3.7.0rc1","3.7.1","4.0.0","4.0.0rc1","4.1.0","4.10.0","4.11.0","4.12.0","4.12.1","4.13.0","4.14.0","4.14.1","4.2.0","4.3.0","4.4.0","4.5.0","4.5.1","4.5.2","4.6.0","4.6.1","4.6.2","4.6.2.post1","4.7.0","4.8.0","4.9.0"]},{"source":"osv","ecosystem":"PyPI","package":"anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.2"}]}],"versions":["1.0.0","1.0.0a1","1.0.0a2","1.0.0b1","1.0.0b2","1.0.0rc1","1.0.0rc2","1.1.0","1.2.0","1.2.1","1.2.2","1.2.3","1.3.0","1.3.1","1.4.0","2.0.0","2.0.0b1","2.0.0b2","2.0.0rc1","2.0.0rc2","2.0.1","2.0.2","2.1.0","2.2.0","3.0.0","3.0.0rc1","3.0.0rc2","3.0.0rc3","3.0.0rc4","3.0.1","3.1.0","3.2.0","3.2.1","3.3.0","3.3.1","3.3.2","3.3.3","3.3.4","3.4.0","3.5.0","3.6.0","3.6.1","3.6.2","3.7.0","3.7.0rc1","3.7.1","4.0.0","4.0.0rc1","4.1.0","4.10.0","4.11.0","4.12.0","4.12.1","4.13.0","4.14.0","4.14.1","4.2.0","4.3.0","4.4.0","4.5.0","4.5.1","4.5.2","4.6.0","4.6.1","4.6.2","4.6.2.post1","4.7.0","4.8.0","4.9.0"]},{"source":"osv","ecosystem":"Root:PyPI","package":"anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.0+aikido.2"},{"fixed":"4.13.0+aikido.1"},{"fixed":"3.7.1+aikido.1"},{"fixed":"4.12.1+aikido.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Micro 6.2","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.8.0-160000.3.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 16.0","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.8.0-160000.3.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP applications 16.0","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.8.0-160000.3.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Public Cloud 15 SP4","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Public Cloud 15 SP5","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Public Cloud 15 SP6","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Python 3 15 SP7","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 15 SP4-LTSS","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 15 SP5-LTSS","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 15 SP6-LTSS","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP4","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP5","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP6","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-150400.9.11.1"}]}],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.2-2","3.5.0-2ubuntu1","3.5.0-3ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.0-1","4.2.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.11.0-3","4.12.1-2","4.12.1-3","4.15.1-3"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.0-3","4.11.0-2","4.11.0-3"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"graphifyy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.97-1.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap 16.0","package":"python-anyio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.8.0-160000.3.1"}]}],"bundled":2}],"products":[{"vendor":"agronholm","product":"anyio"}],"references":[{"url":"https://github.com/agronholm/anyio/security/advisories/GHSA-82r6-8w77-94w6","tags":["x_refsource_CONFIRM","advisory","web","report"]},{"url":"https://github.com/agronholm/anyio/pull/1208","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/agronholm/anyio/commit/68f58915f82d9be8109ebbbd8f5d70577d43f2ce","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/agronholm/anyio/releases/tag/4.14.2","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/advisories/GHSA-82r6-8w77-94w6","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63374.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63374","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-63374","tags":["advisory"]},{"url":"https://github.com/agronholm/anyio","tags":["package"]},{"url":"https://pypi.org/project/anyio","tags":["package"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-202624122-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1281475","tags":["report"]},{"url":"https://bugzilla.suse.com/1281476","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-63374","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-64847","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-202624208-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20264416-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-63374","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63374","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-63374","title":"AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing","description":"AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's certificate to validate. This issue is fixed in version 4.14.2.","status":"published","published":"2026-09-22T15:23:14.259Z","modified":"2026-09-28T16:32:29.169Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"}],"cwes":["CWE-295","CWE-297"],"updated_at":"2026-11-02T14:19:55.914391Z"}],"euvd":[{"id":"EUVD-2026-84522","description":"AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's certificate to validate. This issue is fixed in version 4.14.2.","status":"published","published":"2026-09-22T15:23:14Z","modified":"2026-09-28T16:32:29Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T17:27:53.091489Z"}],"ghsa":[{"id":"GHSA-82r6-8w77-94w6","title":"AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing","description":"### Impact\nServices using internationalized (non-ASCII) domain names are potentially vulnerable to TLS connections made from AnyIO's `connect_tcp()` or directly via `TLSStream.wrap()` where the connection has (through other means) been hijacked and redirected to a malicious server. The attacker would obtain a legitimate certificate using the IDNA 2003 encoded version of the domain name and offer it to the connecting client, making the certificate validate properly on the client's end.\n\n### Patches\nThe vulnerability will be patched in v4.14.2.\n\n### Workarounds\nEncode host names via the `idna` package prior to connecting.","status":"published","published":"2026-09-18T17:17:18Z","modified":"2026-09-18T17:17:19Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"critical"}],"cwes":["CWE-295","CWE-297"],"updated_at":"2026-11-02T14:41:19.455935Z"}],"nvd":[{"id":"CVE-2026-63374","description":"AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's certificate to validate. This issue is fixed in version 4.14.2.","status":"published","published":"2026-09-22T16:17:50.68Z","modified":"2026-09-28T17:17:50.357Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"}],"cwes":["CWE-295","CWE-297"],"updated_at":"2026-11-02T14:12:50.368368Z"}],"osv":[{"id":"CVE-2026-63374","title":"AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing","description":"AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's certificate to validate. This issue is fixed in version 4.14.2.","status":"published","published":"2026-09-22T15:23:14.259Z","modified":"2026-10-29T12:27:02.216338539Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"critical"}],"cwes":["CWE-295","CWE-297"],"updated_at":"2026-11-02T15:45:13.306117Z"},{"id":"DEBIAN-CVE-2026-63374","description":"AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's certificate to validate. This issue is fixed in version 4.14.2.","status":"published","published":"2026-09-22T16:17:50.68Z","modified":"2026-10-06T06:00:06.715147365Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"}],"updated_at":"2026-11-02T15:45:57.932517Z"},{"id":"GHSA-82r6-8w77-94w6","title":"AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing","description":"### Impact\nServices using internationalized (non-ASCII) domain names are potentially vulnerable to TLS connections made from AnyIO's `connect_tcp()` or directly via `TLSStream.wrap()` where the connection has (through other means) been hijacked and redirected to a malicious server. The attacker would obtain a legitimate certificate using the IDNA 2003 encoded version of the domain name and offer it to the connecting client, making the certificate validate properly on the client's end.\n\n### Patches\nThe vulnerability will be patched in v4.14.2.\n\n### Workarounds\nEncode host names via the `idna` package prior to connecting.","status":"published","published":"2026-09-18T17:17:18Z","modified":"2026-10-01T17:56:11.058322399Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"critical"}],"cwes":["CWE-295","CWE-297"],"updated_at":"2026-11-02T15:46:41.732368Z"},{"id":"PYSEC-2026-4025","title":"AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing","description":"### Impact\nServices using internationalized (non-ASCII) domain names are potentially vulnerable to TLS connections made from AnyIO's `connect_tcp()` or directly via `TLSStream.wrap()` where the connection has (through other means) been hijacked and redirected to a malicious server. The attacker would obtain a legitimate certificate using the IDNA 2003 encoded version of the domain name and offer it to the connecting client, making the certificate validate properly on the client's end.\n\n### Patches\nThe vulnerability will be patched in v4.14.2.\n\n### Workarounds\nEncode host names via the `idna` package prior to connecting.","status":"published","published":"2026-10-01T16:38:33.613922Z","modified":"2026-10-01T17:45:01.997111942Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T15:52:57.255153Z"},{"id":"UBUNTU-CVE-2026-63374","description":"AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's certificate to validate. This issue is fixed in version 4.14.2.","status":"published","published":"2026-09-22T16:17:00Z","modified":"2026-10-17T13:00:32.61228019Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T16:56:43.630667Z"},{"id":"CLSA-2026-1790063936","title":"TuxCare security update for anyio (2 CVEs)","description":"TuxCare rebuilt anyio to address 2 CVEs. Fixed in 3.7.1.post2+tuxcare.","status":"published","published":"2026-09-22T07:58:56Z","modified":"2026-10-15T09:48:02.009723726Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"openSUSE-SU-2026:12324-1","title":"graphifyy-0.9.97-1.1 on GA media","description":"These are all security issues fixed in the graphifyy-0.9.97-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-10-28T00:00:00Z","modified":"2026-10-29T12:15:06.045805794Z","updated_at":"2026-11-02T16:58:40.245664Z"},{"id":"openSUSE-SU-2026:22060-1","title":"Security update for python-anyio","description":"This update for python-anyio fixes the following issues:\n\n- CVE-2026-63374: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing (bsc#1281476).\n- CVE-2026-64847: AnyIO process-pool workers can block indefinitely on undrained stderr (bsc#1281475).\n","status":"published","published":"2026-10-08T10:52:11Z","modified":"2026-10-19T17:23:10.65070471Z","updated_at":"2026-11-02T16:58:42.426393Z"},{"id":"ROOT-APP-PYPI-CVE-2026-63374","title":"CVE-2026-63374 in anyio - Patched by Root","description":"Root has patched CVE-2026-63374 in the anyio package for Root:PyPI. Multiple fixed versions available.","status":"published","published":"2026-09-29T08:19:32Z","modified":"2026-09-29T09:15:03.084317127Z","updated_at":"2026-11-02T15:53:28.259095Z"},{"id":"SUSE-SU-2026:24122-1","title":"Security update for python-anyio","description":"This update for python-anyio fixes the following issues:\n\n- CVE-2026-63374: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing (bsc#1281476).\n- CVE-2026-64847: AnyIO process-pool workers can block indefinitely on undrained stderr (bsc#1281475).\n","status":"published","published":"2026-10-08T10:43:41Z","modified":"2026-10-13T17:23:10.205433402Z","updated_at":"2026-11-02T15:54:04.519245Z"},{"id":"SUSE-SU-2026:24208-1","title":"Security update for python-anyio","description":"This update for python-anyio fixes the following issues:\n\n- CVE-2026-63374: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing (bsc#1281476).\n- CVE-2026-64847: AnyIO process-pool workers can block indefinitely on undrained stderr (bsc#1281475).\n","status":"published","published":"2026-10-08T10:43:54Z","modified":"2026-10-21T17:23:09.256266469Z","updated_at":"2026-11-02T15:54:04.519245Z"},{"id":"SUSE-SU-2026:4416-1","title":"Security update for python-anyio","description":"This update for python-anyio fixes the following issues:\n\n- CVE-2026-63374: : TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing (bsc#1281476).\n- CVE-2026-64847: AnyIO process-pool workers can block indefinitely on undrained stderr (bsc#1281475).\n","status":"published","published":"2026-10-02T09:18:08Z","modified":"2026-10-02T18:30:38.509005042Z","updated_at":"2026-11-02T15:54:05.838224Z"}]}}