CVE-2026-68079
Received Received - Intake

Authorization Code Reuse Flaw in Apache CXF

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: Apache Software Foundation

Description
In Apache CXF's DefaultEncryptingCodeDataProvider, a captured authorization code can be redeemed an unlimited number of times due to a flaw in the implementation of the removeCodeGrant functionality. This violates the RFC requirement that "The authorization code MUST NOT be used more than once." Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

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Meta Information

Published
2026-08-06
Last Modified
2026-08-06
Generated
2026-08-06
AI Q&A
2026-08-06
EPSS Evaluated
N/A
NVD
CVE-2026-68079
EUVD
EUVD-2026-53858

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
apache cxf From 4.2.3 (inc)
apache cxf From 4.1.8 (inc)
apache cxf From 3.6.12 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-294 A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).

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Executive Summary

This vulnerability in Apache CXF's DefaultEncryptingCodeDataProvider allows an authorization code to be redeemed multiple times instead of just once. This happens because the removeCodeGrant functionality does not properly invalidate the code after use, violating RFC requirements.

Detection Guidance

Detecting this vulnerability requires checking the Apache CXF version in use. Commands like 'mvn dependency:tree' for Maven projects or inspecting the CXF library files directly can help identify if an affected version (prior to 4.2.3, 4.1.8, or 3.6.12) is deployed.

Impact Analysis

An attacker could reuse a captured authorization code to gain unauthorized access to protected resources repeatedly. This could lead to data breaches, privilege escalation, or unauthorized actions on behalf of legitimate users.

Compliance Impact

This vulnerability could violate compliance requirements that mandate secure handling of authentication codes and user data. It may lead to unauthorized access, data leaks, or non-compliance with data protection principles in GDPR and HIPAA.

Mitigation Strategies

Upgrade Apache CXF to a patched version: 4.2.3 or later, 4.1.8 or later, or 3.6.12 or later. This fixes the flaw in the DefaultEncryptingCodeDataProvider that allows unlimited redemption of authorization codes.

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