CVEvulnerability
CVE-2026-93578
5.9 MEDIUM
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-09-18
- Last modified
- 2026-09-18
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-1035
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certificate revocation checks, allowing applications using Netty's OCSP Client to accept certificates that should have been revoked, leading to an authorization bypass.
Related
Weakness · not in database (1)
References
- https://access.redhat.com/security/cve/CVE-2026-93578 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2536969 bugzilla.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-93578 access.redhat.com