{"id":"CVE-2026-88920","aliases":["DEBIAN-CVE-2026-88920","EUVD-2026-89793","GHSA-4c9g-74h5-78r7","UBUNTU-CVE-2026-88920"],"status":"published","title":"Apache WSS4J: SAML Sender-Vouches Authentication Bypass","description":"An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key.\n\nUsers are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.","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":0.00583,"percentile":0.48336,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2026-09-30T11:58:00Z","modified":"2026-11-04T20:03:01Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"wss4j","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.19-3","1.6.19-4"]},{"source":"osv","ecosystem":"Debian:13","package":"wss4j","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.19-4"]},{"source":"osv","ecosystem":"Debian:14","package":"wss4j","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.19-4"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"wss4j","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.19-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"wss4j","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.19-2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"wss4j","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.19-2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"wss4j","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.19-3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"wss4j","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.19-4build1"]}],"products":[{"vendor":"apache","product":"wss4j"},{"vendor":"apache software foundation","product":"apache wss4j"}],"references":[{"url":"https://lists.apache.org/thread.html/grt43m3bgbzz0mk0cnho3rcybb1j01z9","tags":["vendor-advisory","Mailing List","Vendor Advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/30/10","tags":["Mailing List","Third Party Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88920"},{"url":"https://github.com/advisories/GHSA-4c9g-74h5-78r7"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-88920","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-88920","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88920","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-88920","title":"Apache WSS4J: SAML Sender-Vouches Authentication Bypass","description":"An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key.\n\nUsers are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.","status":"published","published":"2026-09-30T11:58:00.04Z","modified":"2026-09-30T19:48:53.545Z","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-287"],"updated_at":"2026-11-02T13:41:53.237769Z"}],"euvd":[{"id":"EUVD-2026-89793","description":"An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key.\n\nUsers are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.","status":"published","published":"2026-09-30T11:58:00Z","modified":"2026-09-30T19:48:53Z","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":"2026-11-02T17:27:47.293232Z"}],"ghsa":[{"id":"GHSA-4c9g-74h5-78r7","title":"An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated...","description":"An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key.\n\nUsers are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.","status":"published","published":"2026-09-30T12:35:18Z","modified":"2026-09-30T15:31:22Z","updated_at":"2026-11-02T15:12:35.884172Z"}],"nvd":[{"id":"CVE-2026-88920","description":"An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key.\n\nUsers are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.","status":"published","published":"2026-09-30T12:17:14.203Z","modified":"2026-10-02T20:17:49.397Z","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-287"],"updated_at":"2026-11-02T14:12:52.759595Z"}],"osv":[{"id":"DEBIAN-CVE-2026-88920","description":"An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key.  Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.","status":"published","published":"2026-09-30T12:17:14.203Z","modified":"2026-10-03T08:47:32.805182332Z","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":"2026-11-02T15:46:05.506112Z"},{"id":"UBUNTU-CVE-2026-88920","description":"An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key. Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.","status":"published","published":"2026-09-30T12:17:00Z","modified":"2026-11-04T20:03:01.881723674Z","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":"2026-11-04T21:44:40.383812Z"}]}}