CVE-2026-87830

CriticalCVSS 9.1/10Last modified Oct 6, 2026

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.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-917

Affected software

Vendor	Product	Versions
Apache Software Foundation	Apache WSS4J	>= 4.0.0, < 4.0.2; >= 3.0.0, < 3.0.6; < 2.4.4

References

https://lists.apache.org/thread.html/lwlozb1x20d16f9dnyvoygc9rrhzq2vnVendor Advisory
http://www.openwall.com/lists/oss-security/2026/09/30/9Mailing List, Third Party Advisory

Timeline

Published: Sep 30, 2026
Last modified: Oct 6, 2026
NVD status: Analyzed

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