CVE-2026-92899

Apache WSS4J remembers the Nonce of each UsernameToken it accepts, so a captured token cannot be reused. It stored the Nonce as raw base64 text, but authentication decodes that text and uses the bytes.The same bytes can be written as base64 in several ways. An attacker who captured an authenticated request could re-send it with a space added to the Nonce: the password digest still verified, but the token no longer matched the remembered one, so the replay was accepted. Since a UsernameToken does not cover the message body, the captured token could then be reused on requests of the attacker's choosing until it expired. Affects deployments with a nonce replay cache configured, as Apache CXF has by default, and only tokens using a password digest. The cache is now keyed on the decoded Nonce. Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread.html/nrzngsz1xm2lztq3t873663xx9wnrwm7	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/09/30/13	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, 20:18

Type	Values Removed	Values Added
CPE		cpe:2.3:a:apache:wss4j::::::::
References	~~() https://lists.apache.org/thread.html/nrzngsz1xm2lztq3t873663xx9wnrwm7 -~~	() https://lists.apache.org/thread.html/nrzngsz1xm2lztq3t873663xx9wnrwm7 - Mailing List, Vendor Advisory
References	~~() http://www.openwall.com/lists/oss-security/2026/09/30/13 -~~	() http://www.openwall.com/lists/oss-security/2026/09/30/13 - Mailing List, Third Party Advisory
First Time		Apache Apache wss4j

30 Sep 2026, 13:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-30 13:17

Updated : 2026-10-02 20:18

NVD link : CVE-2026-92899

Mitre link : CVE-2026-92899

CVE.ORG link : CVE-2026-92899

JSON object : View

Products Affected

apache

wss4j

CWE

CWE-290

Authentication Bypass by Spoofing

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