{"id":"CVE-2026-87830","aliases":["DEBIAN-CVE-2026-87830","EUVD-2026-89792","GHSA-66vg-36xv-j6x4","UBUNTU-CVE-2026-87830"],"status":"published","title":"Apache WSS4J: Streaming WS-SecurityPolicy validation may skip element-protection checks.","description":"In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption.\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":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.00217,"percentile":0.12339,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-917"],"published":"2026-09-30T11:57:01Z","modified":"2026-11-04T20:04:27Z","affected":[{"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:16.04:LTS","package":"wss4j","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.15-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04: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"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"wss4j","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.19-4","1.6.19-4build1"]}],"products":[{"vendor":"apache","product":"wss4j"},{"vendor":"apache software foundation","product":"apache wss4j"}],"references":[{"url":"https://lists.apache.org/thread.html/lwlozb1x20d16f9dnyvoygc9rrhzq2vn","tags":["vendor-advisory","Vendor Advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/30/9","tags":["Mailing List","Third Party Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87830"},{"url":"https://github.com/advisories/GHSA-66vg-36xv-j6x4"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-87830","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-87830","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-87830","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-87830","title":"Apache WSS4J: Streaming WS-SecurityPolicy validation may skip element-protection checks.","description":"In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption.\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":"2026-09-30T11:57:01.017Z","modified":"2026-09-30T19:47:41.782Z","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","assessor":"adp"}],"cwes":["CWE-917"],"updated_at":"2026-11-02T13:37:47.463822Z"}],"euvd":[{"id":"EUVD-2026-89792","description":"In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption.\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":"2026-09-30T11:57:01Z","modified":"2026-09-30T19:47:41Z","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":"2026-11-02T17:27:47.733217Z"}],"ghsa":[{"id":"GHSA-66vg-36xv-j6x4","title":"In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath...","description":"In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption.\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":"2026-09-30T21:32:05Z","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"}],"cwes":["CWE-917"],"updated_at":"2026-11-02T15:12:38.770231Z"}],"nvd":[{"id":"CVE-2026-87830","description":"In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption.\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":"2026-09-30T12:17:14.087Z","modified":"2026-10-06T17:26:47.927Z","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","assessor":"secondary"}],"cwes":["CWE-917"],"updated_at":"2026-11-02T14:12:52.759595Z"}],"osv":[{"id":"DEBIAN-CVE-2026-87830","description":"In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption. 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":"2026-09-30T12:17:14.087Z","modified":"2026-10-07T09:47:32.312880779Z","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":"2026-11-02T15:46:05.506112Z"},{"id":"UBUNTU-CVE-2026-87830","description":"In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption. 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":"2026-11-04T20:04:27.356019166Z","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":"2026-11-04T21:43:30.004651Z"}]}}