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5.9 Medium

CVE-2026-93578 A flaw was found in Netty's Online Certificate Status Protocol (OCSP) Client

Description

A flaw was found in Netty's Online Certificate Status Protocol (OCSP) Client. The client fails to verify the 'id-kp-OCSPSigning' Extended Key Usage (EKU) in OCSP responder certificates. A remote attacker, holding any valid certificate issued by the same Certificate Authority (CA), can exploit this by forging 'GOOD' OCSP responses for revoked certificates. This bypasses certificate revocation checks, allowing applications using Netty's OCSP Client to accept certificates that should have been revoked, leading to an authorization bypass.

Affected products and versions

Product Affected versions Fixed in
Red Hat build of Apache Camel for Spring Boot 4 Versions not published

References

Timeline

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