{"id":"CVE-2023-38522","aliases":["DEBIAN-CVE-2023-38522","DLA-3897-1","DSA-5758-1","EUVD-2023-42321","GHSA-68qf-xhq3-9qj5","OESA-2024-1955","UBUNTU-CVE-2023-38522"],"status":"published","title":"Apache Traffic Server: Incomplete field name check allows request smuggling","description":"Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable.\n\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4.\n\nUsers are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00987,"percentile":0.62661,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-444","CWE-86"],"published":"2024-07-26T09:11:20Z","modified":"2026-10-28T02:31:06Z","fixes":[{"ecosystem":"Debian:12","package":"trafficserver","fixed_in":["9.2.5+ds-0+deb12u1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.2.5+ds-0+deb12u1"}]}],"versions":["9.2.0+ds-2","9.2.0+ds-2+deb12u1","9.2.1+ds-1","9.2.2+ds-1","9.2.3+ds-1","9.2.3+ds-1+deb12u1","9.2.4+ds-0+deb12u1","9.2.4+ds-1","9.2.4+ds-2"]},{"source":"osv","ecosystem":"Debian:11","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.1.11+ds-0+deb11u1"}]}],"versions":["8.1.1+ds-1.1","8.1.1+ds-1.1+deb11u1","8.1.10+ds-1~deb11u1","8.1.5+ds-1~deb11u1","8.1.6+ds-1~deb10u1","8.1.6+ds-1~deb11u1","8.1.7+ds-1~deb11u1","8.1.9+ds-1~deb11u1"],"bundled":3},{"source":"osv","ecosystem":"Debian:12","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.2.5+ds-0+deb12u1"}]}],"versions":["9.2.0+ds-2","9.2.0+ds-2+deb12u1","9.2.1+ds-1","9.2.2+ds-1","9.2.3+ds-1","9.2.3+ds-1+deb12u1","9.2.4+ds-0+deb12u1","9.2.4+ds-1","9.2.4+ds-2"],"bundled":3},{"source":"osv","ecosystem":"openEuler:24.03-LTS","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.2.5-1.oe2403"}]}],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.0-2ubuntu1","5.3.0-2ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.0.0-5","7.1.2+ds-2","7.1.2+ds-2build1","7.1.2+ds-3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.0.5+ds-1","8.0.5+ds-2","8.0.5+ds-2build1","8.0.5+ds-2ubuntu1","8.0.5+ds-3","8.0.5+ds-3ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.1.1+ds-1.1","9.1.1+ds-2build1","9.1.1+ds-2ubuntu0.1~esm1","9.1.1+ds-2ubuntu0.1","9.1.1+ds-2ubuntu0.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.2.1+ds-1build1","9.2.2+ds-1","9.2.3+ds-1","9.2.3+ds-1+deb12u1","9.2.3+ds-1+deb12u1build1","9.2.3+ds-1+deb12u1build3","9.2.3+ds-1+deb12u1build4","9.2.3+ds-1+deb12u1ubuntu0.1"]}],"products":[{"vendor":"apache","product":"traffic_server"},{"vendor":"apache software foundation","product":"apache traffic server"}],"references":[{"url":"https://lists.apache.org/thread/c4mcmpblgl8kkmyt56t23543gp8v56m0","tags":["vendor-advisory","x_transferred","Mailing List","Vendor Advisory","advisory","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/09/msg00040.html","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-38522","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-68qf-xhq3-9qj5"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/38xxx/CVE-2023-38522.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-38522","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1955","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-35161","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-38522","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-38522","tags":["report"]},{"url":"https://www.openwall.com/lists/oss-security/2024/07/25/1","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-38522","title":"Apache Traffic Server: Incomplete field name check allows request smuggling","description":"Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable.\n\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4.\n\nUsers are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.","status":"published","published":"2024-07-26T09:11:20.419Z","modified":"2025-11-03T21:49:13.216Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:35:29.772612Z"}],"euvd":[{"id":"EUVD-2023-42321","description":"Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable.\n\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4.\n\nUsers are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.","status":"published","published":"2024-07-26T09:11:20Z","modified":"2025-11-03T21:49:13Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T19:49:30.775561Z"}],"ghsa":[{"id":"GHSA-68qf-xhq3-9qj5","title":"Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards...","description":"Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable.\n\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4.\n\nUsers are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.","status":"published","published":"2024-07-26T12:35:48Z","modified":"2025-11-04T00:30:59Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-20","CWE-86","CWE-444"],"updated_at":"2026-11-02T15:04:26.580532Z"}],"nvd":[{"id":"CVE-2023-38522","description":"Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable.\n\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4.\n\nUsers are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.","status":"published","published":"2024-07-26T10:15:01.923Z","modified":"2026-06-17T06:10:38.503Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:09:17.205287Z"}],"osv":[{"id":"CVE-2023-38522","title":"Apache Traffic Server: Incomplete field name check allows request smuggling","description":"Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable.\n\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4.\n\nUsers are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.","status":"published","published":"2024-07-26T09:11:20.419Z","modified":"2026-10-28T02:31:06.921349774Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T15:44:32.922049Z"},{"id":"DEBIAN-CVE-2023-38522","description":"Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable.  This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4.  Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.","status":"published","published":"2024-07-26T10:15:01.923Z","modified":"2026-10-26T18:02:30.376867545Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:39.980321Z"},{"id":"OESA-2024-1955","title":"trafficserver security update","description":"Apache Traffic Server is an OpenSource HTTP / HTTPS / HTTP/2 / QUIC reverse, forward and transparent proxy and cache.\r\n\r\nSecurity Fix(es):\r\n\r\nApache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable.\r\n\r\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4.\r\n\r\nUsers are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.(CVE-2023-38522)\r\n\r\nApache Traffic Server forwards malformed HTTP chunked trailer section to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable.\r\n\r\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4.\r\n\r\nUsers can set a new setting (proxy.config.http.drop_chunked_trailers) not to forward chunked trailer section.\nUsers are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.(CVE-2024-35161)","status":"published","published":"2024-08-09T11:07:25Z","modified":"2026-08-18T01:18:32.627674956Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:52:41.595342Z"},{"id":"UBUNTU-CVE-2023-38522","description":"Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.","status":"published","published":"2024-07-26T10:15:00Z","modified":"2026-04-22T14:09:45.191555Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T16:54:21.882004Z"},{"id":"DLA-3897-1","title":"trafficserver - security update","status":"published","published":"2024-09-27T00:00:00Z","modified":"2026-03-09T01:19:01.047537Z","updated_at":"2026-11-02T15:46:12.203458Z"},{"id":"DSA-5758-1","title":"trafficserver - security update","status":"published","published":"2024-08-26T00:00:00Z","modified":"2026-03-09T02:08:43.574183Z","updated_at":"2026-11-02T15:46:17.892347Z"}]}}