Apache CXF up to 3.6.12/4.1.8/4.2.3 Max Age Authentication-Freshness Check OidcClientCodeRequestFilter incorrect operator

Summaryinfo

A vulnerability labeled as critical has been found in Apache CXF up to 3.6.12/4.1.8/4.2.3. Impacted is the function OidcClientCodeRequestFilter of the component Max Age Authentication-Freshness Check. Such manipulation leads to incorrect operator. This vulnerability is listed as CVE-2026-71575. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Apache CXF up to 3.6.12/4.1.8/4.2.3. Affected by this issue is the function OidcClientCodeRequestFilter of the component Max Age Authentication-Freshness Check. The manipulation with an unknown input leads to a incorrect operator vulnerability. Using CWE to declare the problem leads to CWE-480. The product accidentally uses the wrong operator, which changes the logic in security-relevant ways. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The max_age authentication-freshness check in OidcClientCodeRequestFilter was inoperative due to a milliseconds/seconds unit mismatch and an inverted comparison polarity. Any relying party using setMaxAgeOffset to enforce re-authentication would silently accept sessions of any age, bypassing step-up authentication policies. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

The advisory is available at lists.apache.org. This vulnerability is handled as CVE-2026-71575 since 08/07/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/09/2026).

Upgrading to version 3.6.13, 4.1.9 or 4.2.4 eliminates this vulnerability.

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Productinfo

Type

• Application Server Software

Vendor

• Apache

Name

• CXF

Version

• 3.6.0
• 3.6.1
• 3.6.2
• 3.6.3
• 3.6.4
• 3.6.5
• 3.6.6
• 3.6.7
• 3.6.8
• 3.6.9
• 3.6.10
• 3.6.11
• 3.6.12
• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.1.6
• 4.1.7
• 4.1.8
• 4.2.0
• 4.2.1
• 4.2.2
• 4.2.3

License

• open-source

Website

• Vendor: https://www.apache.org/

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