CVE-2026-87830

Apache WSS4J: Streaming WS-SecurityPolicy validation may skip element-protection checks.

State: Published
Severity: 9.1 Critical
Published: Sep 30, 2026
Updated: Sep 30, 2026
Reserved: Sep 9, 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.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	CISA-ADP

Weaknesses

CWE-917 Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')

Affected Products

Product	Versions
Apache WSS4JApache Software Foundation	4.0.0 to before 4.0.2Affected 3.0.0 to before 3.0.6Affected before 2.4.4Affected

References

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