Time-of-check Time-of-use (TOCTOU) Race Condition Affecting org.apache.cxf:cxf-rt-rs-security-oauth2 package, versions [,3.6.13)[4.1.0,4.1.9)[4.2.0,4.2.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published26 Oct 2026
- disclosed9 Oct 2026
- creditGuanping Zhang
Introduced: 9 Oct 2026
NewCVE-2026-73179 (opens in a new tab)How to fix?
Upgrade org.apache.cxf:cxf-rt-rs-security-oauth2 to version 3.6.13, 4.1.9, 4.2.4 or higher.
Overview
org.apache.cxf:cxf-rt-rs-security-oauth2 is a services framework.
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition through the removeCodeGrant method in the JPA OAuth2 authorization code grant provider. A remote attacker can obtain multiple valid access tokens from one authorization code by sending concurrent token exchange requests that race the provider’s non-atomic lookup and deletion against a shared relational database using READ_COMMITTED isolation.