CriticalCritical vulnerability
CVE-2026-87830 (CVSS 9.1)
NVD · officialPublished Sep 30, 2026Risk 50/100
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.
Technical details
CVSS
9.1
AV:NetworkAC:LowPR:NoneUI:NoneC:HighI:HighA:None
Evidence and sources
This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.
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