An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key. Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.
History

Fri, 02 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:apache:wss4j:*:*:*:*:*:*:*:*

Thu, 01 Oct 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-347
References
Metrics threat_severity

None

threat_severity

Important


Wed, 30 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

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


Wed, 30 Sep 2026 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache wss4j
Vendors & Products Apache
Apache wss4j

Wed, 30 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-287

Wed, 30 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
References

Wed, 30 Sep 2026 12:00:00 +0000

Type Values Removed Values Added
Description An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key. 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: SAML Sender-Vouches Authentication Bypass
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published: 2026-09-30T11:58:00.040Z

Updated: 2026-09-30T19:48:53.545Z

Reserved: 2026-09-10T13:32:10.370Z

Link: CVE-2026-88920

cve-icon Vulnrichment

Updated: 2026-09-30T12:12:22.214Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-30T12:17:14.203

Modified: 2026-10-02T20:17:49.397

Link: CVE-2026-88920

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-30T11:58:00Z

Links: CVE-2026-88920 - Bugzilla