{"id":"CVE-2026-8367","aliases":["DEBIAN-CVE-2026-8367","EUVD-2026-30042","GHSA-rpx3-3f8j-f6v2","JLSEC-2026-1347","UBUNTU-CVE-2026-8367"],"status":"published","title":"aria2c Improper Certificate Validation","description":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.","severity":{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00127,"percentile":0.02403,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-295"],"published":"2026-05-13T14:55:09Z","modified":"2026-10-28T02:30:22Z","fixes":[{"ecosystem":"Julia","package":"Aria2_jll","fixed_in":["1.37.0+0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.36.0-1","1.36.0-2"]},{"source":"osv","ecosystem":"Debian:13","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.1-1","0.10.2+1-1","0.11.0-1","0.11.2-1","0.11.3-1","0.12.0-1","0.12.1-1","0.13.1+1-1","0.14.0-1","0.14.0-1+lenny1","0.14.0-1+lenny2","0.7.3-1","0.8.0-1","0.8.1-1","0.9.0-1","1.0.1-1","1.1.2-1","1.10.0-1","1.10.0-2","1.10.6-1","1.10.9-1","1.11.1-1","1.11.2-1","1.12.0-1","1.12.1-1","1.12.1-2","1.13.0-1","1.14.0-1","1.14.1-1","1.14.2-1","1.14.2-2","1.15.0-1","1.15.0-2","1.15.1-1","1.15.2-1","1.16.0-1","1.16.1-1","1.17.0-1","1.18.0-1","1.18.0-2","1.18.1-1","1.18.10-1","1.18.10-2","1.18.3-1","1.18.5-1","1.18.7-1","1.18.8-1","1.19.0-1","1.2.0-1","1.21.0-1","1.24.0-1","1.25.0-1","1.26.1-1","1.27.1-1","1.29.0-1","1.3.0-1","1.3.2-1","1.30.0-1","1.30.0-2","1.31.0-1","1.32.0-1","1.32.0-2","1.33.1-1","1.34.0-1","1.34.0-2","1.34.0-3","1.34.0-4","1.35.0-1","1.35.0-2","1.35.0-3","1.36.0-1","1.36.0-2","1.4.1-1","1.6.2-1","1.6.2-2","1.6.2-3","1.7.1-1","1.7.2-1","1.8.0-1","1.8.2-1","1.9.0-1","1.9.1-1","1.9.3-1","1.9.4-1","1.9.5-1"]},{"source":"osv","ecosystem":"Debian:14","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.1-1","0.10.2+1-1","0.11.0-1","0.11.2-1","0.11.3-1","0.12.0-1","0.12.1-1","0.13.1+1-1","0.14.0-1","0.14.0-1+lenny1","0.14.0-1+lenny2","0.7.3-1","0.8.0-1","0.8.1-1","0.9.0-1","1.0.1-1","1.1.2-1","1.10.0-1","1.10.0-2","1.10.6-1","1.10.9-1","1.11.1-1","1.11.2-1","1.12.0-1","1.12.1-1","1.12.1-2","1.13.0-1","1.14.0-1","1.14.1-1","1.14.2-1","1.14.2-2","1.15.0-1","1.15.0-2","1.15.1-1","1.15.2-1","1.16.0-1","1.16.1-1","1.17.0-1","1.18.0-1","1.18.0-2","1.18.1-1","1.18.10-1","1.18.10-2","1.18.3-1","1.18.5-1","1.18.7-1","1.18.8-1","1.19.0-1","1.2.0-1","1.21.0-1","1.24.0-1","1.25.0-1","1.26.1-1","1.27.1-1","1.29.0-1","1.3.0-1","1.3.2-1","1.30.0-1","1.30.0-2","1.31.0-1","1.32.0-1","1.32.0-2","1.33.1-1","1.34.0-1","1.34.0-2","1.34.0-3","1.34.0-4","1.35.0-1","1.35.0-2","1.35.0-3","1.36.0-1","1.36.0-2","1.4.1-1","1.6.2-1","1.6.2-2","1.6.2-3","1.7.1-1","1.7.2-1","1.8.0-1","1.8.2-1","1.9.0-1","1.9.1-1","1.9.3-1","1.9.4-1","1.9.5-1"]},{"source":"osv","ecosystem":"Julia","package":"Aria2_jll","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.37.0+0"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17.0-1","1.18.0-1","1.18.0-1ubuntu2","1.18.0-2","1.18.1-1","1.18.1-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.19.0-1","1.19.0-1build1","1.19.0-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.32.0-1","1.32.0-2","1.33.1-1","1.33.1-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.34.0-4","1.35.0-1","1.35.0-1build1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.35.0-3","1.36.0-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.36.0-2","1.37.0+debian-1","1.37.0+debian-1build1","1.37.0+debian-1build2","1.37.0+debian-1build3"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.37.0+debian-3","1.37.0+debian-3build1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.37.0+debian-4"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"aria2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.37.0+debian-3build1","1.37.0+debian-4"]}],"products":[{"vendor":"aria2_project","product":"aria2"},{"vendor":"aria2_project","product":"aria2c"}],"references":[{"url":"https://www.tenable.com/security/research/tra-2026-38","tags":["Exploit","Third Party Advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8367","tags":["advisory","web"]},{"url":"https://github.com/advisories/GHSA-rpx3-3f8j-f6v2","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8367.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-8367","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-8367","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-8367","tags":["report"]},{"url":"https://github.com/aria2/aria2/issues/2355","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-8367","title":"aria2c Improper Certificate Validation","description":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.","status":"published","published":"2026-05-13T14:55:09.815Z","modified":"2026-05-13T18:35:03.804Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T13:48:13.398044Z"}],"euvd":[{"id":"EUVD-2026-30042","description":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.","status":"published","published":"2026-05-13T14:55:09Z","modified":"2026-05-13T18:35:03Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T19:04:33.260537Z"}],"ghsa":[{"id":"GHSA-rpx3-3f8j-f6v2","title":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers...","description":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.","status":"published","published":"2026-05-13T18:30:57Z","modified":"2026-05-13T18:31:07Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:08:07.741271Z"}],"nvd":[{"id":"CVE-2026-8367","description":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.","status":"published","published":"2026-05-13T16:17:04.78Z","modified":"2026-10-26T17:10:03.27Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:12:19.020465Z"}],"osv":[{"id":"CVE-2026-8367","title":"aria2c Improper Certificate Validation","description":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.","status":"published","published":"2026-05-13T14:55:09.815Z","modified":"2026-10-28T02:30:22.595460033Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:45:18.482949Z"},{"id":"DEBIAN-CVE-2026-8367","description":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.","status":"published","published":"2026-05-13T16:17:04.78Z","modified":"2026-10-27T09:47:34.065455428Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:46:04.577397Z"},{"id":"JLSEC-2026-1347","title":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers...","description":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.","status":"published","published":"2026-08-20T14:10:49.804Z","modified":"2026-08-20T14:29:26.27233163Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:47:18.159338Z"},{"id":"UBUNTU-CVE-2026-8367","description":"aria2c accepts a server certificate with incorrect Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.","status":"published","published":"2026-05-13T16:17:00Z","modified":"2026-10-17T13:01:12.324920869Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T16:57:22.213888Z"}]}}