OCTOBER 3, 2026
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Case File

CVE-2026-92899

MEDIUM · CVSS 4.8 EPSS 0.26%

Source: NVD + CISA KEV + EPSS · Published 2026-09-30 · Last synced 2026-10-03

CyberRota Analysis

AI-Generated

Apache WSS4J is vulnerable due to its handling of Nonce values in UsernameTokens, allowing attackers to replay captured tokens by manipulating the Nonce format. This could lead to unauthorized access as the replayed tokens may be accepted for requests until they expire. Organizations using Apache CXF with nonce replay cache enabled, particularly those relying on password digest tokens, should prioritize upgrading to the recommended secure versions to mitigate this risk.

CVE
CVE-2026-92899
Severity
MEDIUM
CVSS
4.8
EPSS
0.26%
Apache

Original NVD Description

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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)