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.

CVSS Vector

References

• https://lists.apache.org/thread.html/lwlozb1x20d16f9dnyvoygc9rrhzq2vn
• http://www.openwall.com/lists/oss-security/2026/09/30/9