CVE-2026-87830

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

Published Sep 30, 2026 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:apache:wss4j:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Weaknesses CWE-264
CWE-643
Type Values Removed Values Added
Weaknesses CWE-917
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apache
Apache wss4j
Vendors & Products Apache
Apache wss4j
Type Values Removed Values Added
Weaknesses CWE-264
CWE-643
Type Values Removed Values Added
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.
Title Apache WSS4J: Streaming WS-SecurityPolicy validation may skip element-protection checks.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Sep 30, 2026, 7:47 PM
Reserved
Sep 9, 2026, 11:00 AM
Status
Analyzed
Published
Sep 30, 2026, 12:17 PM
Modified
Oct 6, 2026, 5:26 PM