{"id":"CVE-2026-104056","aliases":["DEBIAN-CVE-2026-104056","EUVD-2026-91003","GHSA-8wx9-759m-hfm8","UBUNTU-CVE-2026-104056"],"status":"published","title":"CVE-2026-104056","description":"Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.002,"percentile":0.10032,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-345","CWE-346","CWE-829"],"published":"2026-10-01T18:03:27Z","modified":"2026-10-17T12:58:42Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"python-authlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.0-1","1.2.0-1+deb12u1","1.2.0-1+deb12u2","1.2.1-1","1.3.0-1","1.3.0-2","1.3.0-3","1.3.1-1","1.3.2-1","1.3.2-2","1.4.0-1","1.4.1-1","1.5.0-1","1.5.1-1","1.5.2-1","1.6.0-1","1.6.1-1","1.6.3-1","1.6.4-1","1.6.5-1","1.6.6-1","1.6.7-1","1.6.8-1","1.6.9-1","1.7.0-1","1.7.2-1","1.7.2-2"]},{"source":"osv","ecosystem":"Debian:13","package":"python-authlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.0-1","1.6.0-1+deb13u1","1.6.1-1","1.6.3-1","1.6.4-1","1.6.5-1","1.6.6-1","1.6.7-1","1.6.8-1","1.6.9-1","1.7.0-1","1.7.2-1","1.7.2-2"]},{"source":"osv","ecosystem":"Debian:14","package":"python-authlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.0-1","1.6.1-1","1.6.3-1","1.6.4-1","1.6.5-1","1.6.6-1","1.6.7-1","1.6.8-1","1.6.9-1","1.7.0-1","1.7.2-1","1.7.2-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"python-authlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.15.4-1","0.15.5-1","0.15.5-1ubuntu0.1~esm1","0.15.5-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"python-authlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.1-1","1.3.0-1","1.3.0-1ubuntu0.1~esm1","1.3.0-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"python-authlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.7-1","1.7.2-1","1.7.2-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:26.04:LTS","package":"python-authlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.0-1","1.6.5-1","1.6.6-1","1.6.7-1","1.6.7-1ubuntu0.1~esm1"]}],"products":[{"vendor":"authlib","product":"authlib"}],"references":[{"url":"https://uziii2208.github.io/post/cve-2026-104056/","tags":["exploit","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104056"},{"url":"https://uziii2208.github.io/post/cve-2026-104056"},{"url":"https://github.com/advisories/GHSA-8wx9-759m-hfm8"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-104056","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-104056","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-104056","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-104056","title":"CVE-2026-104056","description":"Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.","status":"published","published":"2026-10-01T18:03:27.484Z","modified":"2026-10-05T18:21:14.48Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-345","CWE-346","CWE-829"],"updated_at":"2026-11-02T14:20:09.448255Z"}],"euvd":[{"id":"EUVD-2026-91003","description":"Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.","status":"published","published":"2026-10-01T18:03:27Z","modified":"2026-10-05T18:21:14Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T17:27:39.384414Z"}],"ghsa":[{"id":"GHSA-8wx9-759m-hfm8","title":"Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached...","description":"Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.","status":"published","published":"2026-10-01T21:32:50Z","modified":"2026-10-05T21:31:30Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T15:12:48.668129Z"}],"nvd":[{"id":"CVE-2026-104056","description":"Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.","status":"published","published":"2026-10-01T19:17:19.033Z","modified":"2026-10-05T19:17:14.327Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-345","CWE-346","CWE-829"],"updated_at":"2026-11-02T14:12:53.41762Z"}],"osv":[{"id":"DEBIAN-CVE-2026-104056","description":"Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.","status":"published","published":"2026-10-01T19:17:19.033Z","modified":"2026-10-06T10:00:20.226907634Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:48.903138Z"},{"id":"UBUNTU-CVE-2026-104056","description":"Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.","status":"published","published":"2026-10-01T19:17:00Z","modified":"2026-10-17T12:58:42.827312491Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T16:55:59.130573Z"}]}}