{"id":"CVE-2022-31778","aliases":["DEBIAN-CVE-2022-31778","DLA-3385-1","DSA-5206-1","EUVD-2022-53171","GHSA-w7rf-qxv9-mpv7","UBUNTU-CVE-2022-31778"],"status":"published","title":"Transfer-Encoding not treated as hop-by-hop","description":"Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 8.0.0 to 9.0.2.","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":0.02142,"percentile":0.82189,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2022-08-10T00:00:00Z","modified":"2026-11-03T08:03:41Z","fixes":[{"ecosystem":"Debian:12","package":"trafficserver","fixed_in":["9.1.3+ds-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.1.3+ds-1"}]}]},{"source":"osv","ecosystem":"Debian:10","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.1.6+ds-1~deb10u1"}]}],"versions":["8.0.2+ds-1","8.0.2+ds-1+deb10u1","8.0.2+ds-1+deb10u2","8.0.2+ds-1+deb10u3","8.0.2+ds-1+deb10u4","8.0.2+ds-1+deb10u5","8.0.2+ds-1+deb10u6","8.0.2+ds-1+deb10u7","8.0.3+ds-1","8.0.3+ds-2","8.0.3+ds-3","8.0.3+ds-4","8.0.5+ds-1","8.0.5+ds-2","8.0.5+ds-3","8.0.6+ds-1","8.0.7+ds-1","8.0.8+ds-1","8.0.8+ds-2","8.1.0+ds-1","8.1.0+ds-2","8.1.1+ds-1","8.1.1+ds-1.1","8.1.5+ds-1~deb11u1"],"bundled":4},{"source":"osv","ecosystem":"Debian:11","package":"trafficserver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.1.5+ds-1~deb11u1"}]}],"versions":["8.1.1+ds-1.1","8.1.1+ds-1.1+deb11u1"],"bundled":6},{"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"]}],"products":[{"vendor":"apache","product":"traffic_server"},{"vendor":"apache software foundation","product":"apache traffic server"},{"vendor":"debian","product":"debian_linux"}],"references":[{"url":"https://lists.apache.org/thread/rc64lwbdgrkv674koc3zl1sljr9vwg21","tags":["x_transferred","Mailing List","Vendor Advisory","web","report"]},{"url":"https://www.debian.org/security/2022/dsa-5206","tags":["vendor-advisory","x_transferred","Third Party Advisory","advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00007.html","tags":["mailing-list","x_transferred","article"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-31778","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-w7rf-qxv9-mpv7"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/31xxx/CVE-2022-31778.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2022-31778","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2022-31778","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-31778","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2022-31778","title":"Transfer-Encoding not treated as hop-by-hop","description":"Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 8.0.0 to 9.0.2.","status":"published","published":"2022-08-10T00:00:00Z","modified":"2024-08-03T07:26:01.21Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:34:35.279735Z"}],"euvd":[{"id":"EUVD-2022-53171","description":"Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 8.0.0 to 9.0.2.","status":"published","published":"2022-08-10T00:00:00Z","modified":"2024-08-03T07:26:01Z","updated_at":"2026-11-03T03:25:33.60677Z"}],"ghsa":[{"id":"GHSA-w7rf-qxv9-mpv7","title":"Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache...","description":"Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 8.0.0 to 9.0.2.","status":"published","published":"2022-08-11T00:00:21Z","modified":"2023-04-06T03:30:16Z","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"],"updated_at":"2026-11-02T14:54:26.767421Z"}],"nvd":[{"id":"CVE-2022-31778","description":"Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 8.0.0 to 9.0.2.","status":"published","published":"2022-08-10T06:15:08.567Z","modified":"2026-06-17T04:46:17.553Z","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"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:07:24.750124Z"}],"osv":[{"id":"DEBIAN-CVE-2022-31778","description":"Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 8.0.0 to 9.0.2.","status":"published","published":"2022-08-10T06:15:08.567Z","modified":"2026-11-03T08:03:41.51232202Z","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":"2026-11-03T08:24:24.826312Z"},{"id":"UBUNTU-CVE-2022-31778","description":"Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 8.0.0 to 9.0.2.","status":"published","published":"2022-08-10T06:15:00Z","modified":"2026-04-22T13:22:55.73663Z","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":"2026-11-02T16:53:53.899276Z"},{"id":"CVE-2022-31778","title":"Transfer-Encoding not treated as hop-by-hop","description":"Improper Input Validation vulnerability in handling the Transfer-Encoding header of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 8.0.0 to 9.0.2.","status":"published","published":"2022-08-10T00:00:00Z","modified":"2026-10-28T02:30:53.237225701Z","cwes":["CWE-20"],"updated_at":"2026-11-02T15:44:25.860945Z"},{"id":"DLA-3385-1","title":"trafficserver - security update","status":"published","published":"2023-04-05T00:00:00Z","modified":"2026-03-09T01:23:13.335631Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"DSA-5206-1","title":"trafficserver - security update","status":"published","published":"2022-08-12T00:00:00Z","modified":"2026-03-09T02:08:48.263246Z","updated_at":"2026-11-02T15:46:17.543497Z"}]}}