Improper Verification of Cryptographic Signature Affecting org.apache.cxf:cxf-rt-rs-security-sso-oidc 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-19342000
- published27 Aug 2026
- disclosed6 Aug 2026
- creditUnknown
Introduced: 6 Aug 2026
NewCVE-2026-57817 (opens in a new tab)How to fix?
Upgrade org.apache.cxf:cxf-rt-rs-security-sso-oidc to version 3.6.12, 4.1.8, 4.2.3 or higher.
Overview
org.apache.cxf:cxf-rt-rs-security-sso-oidc is an Apache CXF Runtime OpenId Connect library.
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature in the OpenID Connect Hybrid Flow when the c_hash parameter is not validated. An attacker can substitute or inject an authorization code by exploiting the lack of enforcement of the c_hash parameter when integrated with a non-compliant or misconfigured Identity Provider (IdP). This is only exploitable if the Identity Provider omits the c_hash parameter in the Hybrid Flow.