CVE-2026-87830 — Apache WSS4J: Streaming WS-SecurityPolicy validation may skip element-protection checks.

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache WSS4J	affected 4.0.0 before 4.0.2; affected 3.0.0 before 3.0.6; affected 0 before 2.4.4

CWE

No CWE identifiers supplied.

References

https://lists.apache.org/thread.html/lwlozb1x20d16f9dnyvoygc9rrhzq2vn

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/09/30/9

CISA-ADP

No English description supplied.

No references supplied.