CVE-2026-68079 Apache Software Foundation CVE debrief

Who should care

Apache CXF users, security teams, and administrators responsible for maintaining and securing systems using Apache CXF should be aware of this vulnerability and take steps to mitigate it. This includes reviewing system configurations, assessing exposure, and planning for upgrades or mitigations. Operators of affected systems should prioritize patching and review compensating controls.

Technical summary

Apache CXF's DefaultEncryptingCodeDataProvider has a flaw in the implementation of the removeCodeGrant functionality, allowing a captured authorization code to be redeemed an unlimited number of times. This violates the RFC requirement that 'The authorization code MUST NOT be used more than once.' The vulnerability affects Apache CXF versions prior to 4.2.3, 4.1.8, or 3.6.12. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue. The flaw in the removeCodeGrant functionality can lead to potential authorization code reuse attacks. Apache CXF users should prioritize upgrading to patched versions to prevent such attacks. Reviewing system configurations, assessing exposure, and planning for upgrades or mitigations are crucial steps for users of affected systems.

Defensive priority

Apache CXF users should prioritize upgrading to patched versions to prevent potential authorization code reuse attacks.

Recommended defensive actions

• Upgrade to Apache CXF version 4.2.3, 4.1.8, or 3.6.12
• Review and update affected systems
• Monitor for potential authorization code reuse attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in Apache CXF's DefaultEncryptingCodeDataProvider. Limited information is available on potential attacks or affected systems. Users should verify the affected versions and configurations, assess their exposure, and plan for upgrades or mitigations. Evidence is limited to CVE and NVD details.

Official resources