CVE-2026-57818 in CXF
Summary
by MITRE • 08/06/2026
A race condition in JCacheCodeDataProvider allows an attacker to redeem a single authorization code multiple times via concurrent requests, resulting in the issuance of multiple distinct, valid access tokens. Users are recommended to upgrade to versions 4.2.3, 4.1.8 or 3.6.12, which fix this issue.
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Analysis
by VulDB Data Team • 08/06/2026
This vulnerability represents a critical race condition flaw within the JCacheCodeDataProvider component that fundamentally undermines the security of authorization code redemption processes. The issue stems from improper synchronization mechanisms during concurrent request handling, allowing malicious actors to exploit temporal gaps in code validation. When multiple requests attempt to redeem the same authorization code simultaneously, the system fails to properly enforce atomicity in code consumption, creating opportunities for duplicate token issuance.
The technical implementation flaw resides in the lack of proper locking mechanisms or atomic operations when validating and consuming authorization codes from the cache store. This race condition manifests when concurrent threads access the same cached authorization code without adequate mutual exclusion controls. The underlying CWE classification aligns with CWE-362, which specifically addresses race conditions where multiple threads or processes access shared resources without proper synchronization. This vulnerability directly impacts the integrity of the OAuth 2.0 authorization flow by enabling unauthorized token duplication.
The operational impact of this vulnerability extends beyond simple privilege escalation to compromise the fundamental security assumptions of the authentication system. An attacker can repeatedly submit concurrent requests using identical authorization codes, resulting in multiple valid access tokens being generated for a single authorization grant. This effectively undermines the one-time use principle that authorization codes should adhere to, potentially enabling unauthorized access to protected resources and data exposure. The vulnerability creates a persistent threat vector that remains active as long as the race condition exists within the code execution path.
Security practitioners should immediately implement the recommended version upgrades to address this vulnerability, specifically targeting versions 4.2.3, 4.1.8, or 3.6.12 which contain proper synchronization fixes. Organizations operating in environments where this component is deployed must conduct thorough vulnerability assessments and consider implementing additional monitoring for suspicious concurrent request patterns. The mitigation strategy should also include reviewing all cache implementations for similar race condition vulnerabilities and ensuring proper atomic operations are enforced during code redemption processes. This vulnerability demonstrates the critical importance of thread safety in authentication systems and aligns with ATT&CK technique T1566 which covers credential access through exploitation of software vulnerabilities, specifically targeting authorization mechanisms that fail to properly validate token usage patterns.