Insufficient Verification of Data Authenticity Affecting org.apache.cxf:cxf-rt-rs-security-oauth2 package, versions [,3.6.12)[4.0.0,4.1.8)[4.2.0,4.2.3)
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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Test your applications- Snyk IDSNYK-JAVA-ORGAPACHECXF-19341995
- published27 Aug 2026
- disclosed6 Aug 2026
- creditGuanping Zhang
Introduced: 6 Aug 2026
NewCVE-2026-63687 (opens in a new tab)How to fix?
Upgrade org.apache.cxf:cxf-rt-rs-security-oauth2 to version 3.6.12, 4.1.8, 4.2.3 or higher.
Overview
org.apache.cxf:cxf-rt-rs-security-oauth2 is a services framework.
Affected versions of this package are vulnerable to Insufficient Verification of Data Authenticity in the JwtRequestCodeFilter process. An attacker can override security-sensitive parameters such as code_challenge, code_challenge_method, nonce, and state by submitting a validly-signed request JWT, potentially compromising PKCE integrity and replay protection mechanisms.