Bug 2543896 (CVE-2026-88920)

Summary:	CVE-2026-88920 org.apache.wss4j/wss4j-ws-security-dom: Apache WSS4J: Authentication bypass via unsigned SAML sender-vouches assertion
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	anujha, aschwart, asoldano, aszczucz, bbaranow, bmaxwell, boliveir, bstansbe, dlofthou, drichtar, fmariani, fmongiar, gmalinko, istudens, ivassile, iweiss, janstey, jnethert, jwon, mcarlett, mosmerov, mposolda, msvehla, nwallace, pberan, pdelbell, pesilva, pjindal, pmackay, rmartinc, rstancel, rstepani, ssilvert, sthorger, tcunning, thjenkin, vdosoudi, vmuzikar, yfang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in Apache WSS4J. This vulnerability in the Document Object Model (DOM) security processor allows an unauthenticated remote attacker to bypass authentication and forge authenticated Simple Object Access Protocol (SOAP) messages. An attacker can exploit this issue by submitting a crafted, unsigned Security Assertion Markup Language (SAML) sender-vouches assertion containing an attacker-controlled key.	Story Points:	---
Clone Of:		Environment:
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Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-30 12:02:24 UTC

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.

Comment 1 Jon Orris 2026-10-15 23:26:09 UTC

This issue has been addressed in the following products:

  Red Hat Build of Apache Camel 4.18 for Quarkus 3.33

Via RHSA-2026:83670 https://access.redhat.com/errata/RHSA-2026:83670