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VULNERABILITIES

CVE-2026-93578 Details

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certificate revocation checks, allowing applications using Netty's OCSP Client to accept certificates that should have been revoked, leading to an authorization bypass.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.9 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/security/cve/CVE-2026-93578 CISA-ADP
https://access.redhat.com/security/cve/CVE-2026-93578 [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2536969 [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-1035OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-93578
NVD Published Date:
Sep 18, 2026
NVD Last Modified:
Sep 18, 2026
Source:
[email protected]