{"id":"CVE-2026-87830","title":"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","summary":"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 witho…","severity":"none","vendor":"Apache Software Foundation","product":"org.apache.wss4j:wss4j-ws-security-policy-stax","affected":["org.apache.wss4j:wss4j-ws-security-policy-stax >= 4.0.0 < 4.0.2","org.apache.wss4j:wss4j-ws-security-policy-stax >= 3.0.0 < 3.0.6","org.apache.wss4j:wss4j-ws-security-policy-stax < 2.4.4"],"published":"2026-09-30","updated":"2026-09-30","sourceUpdated":"2026-09-30T13:17:21.350","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87830","references":[{"url":"https://lists.apache.org/thread.html/lwlozb1x20d16f9dnyvoygc9rrhzq2vn","label":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/30/9","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-30T12:02:58.585Z","slug":"CVE-2026-87830","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}