CVE-2026-88920

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread.html/grt43m3bgbzz0mk0cnho3rcybb1j01z9	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/09/30/10	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:wss4j::::::::
	cpe:2.3:a:apache:wss4j::::::::
	cpe:2.3:a:apache:wss4j::::::::

History

02 Oct 2026, 20:17

Type	Values Removed	Values Added
First Time		Apache Apache wss4j
CPE		cpe:2.3:a:apache:wss4j::::::::
References	~~() https://lists.apache.org/thread.html/grt43m3bgbzz0mk0cnho3rcybb1j01z9 -~~	() https://lists.apache.org/thread.html/grt43m3bgbzz0mk0cnho3rcybb1j01z9 - Mailing List, Vendor Advisory
References	~~() http://www.openwall.com/lists/oss-security/2026/09/30/10 -~~	() http://www.openwall.com/lists/oss-security/2026/09/30/10 - Mailing List, Third Party Advisory

30 Sep 2026, 20:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8
CWE		CWE-287

30 Sep 2026, 13:17

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/09/30/10 -

30 Sep 2026, 12:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-30 12:17

Updated : 2026-10-02 20:17

NVD link : CVE-2026-88920

Mitre link : CVE-2026-88920

CVE.ORG link : CVE-2026-88920

JSON object : View

Products Affected

apache

wss4j

CWE

CWE-287

Improper Authentication

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