CVE-2026-3832 Gnutls: gnutls: security bypass allows acceptance of revoked server certificates via crafted ocsp response
A remote attacker can bypass certificate revocation checks by sending a crafted OCSP response, allowing acceptance of revoked server certificates.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-3832?
CVE-2026-3832 is a low-severity vulnerability in Gnu Gnutls, published on 30 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted Online Certificate Status Protocol (OCSP) response during a TLS handshake. Due to a logic error in how gnutls processes multi-record OCSP responses, a client with OCSP verification enabled may incorrectly accept a revoked server certificate, potentially leading to a compromise of trust.
Weakness: CWE-179
Which versions are affected by CVE-2026-3832?
It affects 4 products.
Products include Gnu Gnutls, Redhat Enterprise Linux, Redhat Hardened Images, Redhat Openshift Container Platform.
How do I fix CVE-2026-3832?
Apply the vendor's patch.
Is CVE-2026-3832 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3832 exists.
Other vulnerabilities in Gnu Gnutls
Sources
Also known as ALPINE-CVE-2026-3832, AZL-85986, BELL-CVE-2026-3832, DEBIAN-CVE-2026-3832, ECHO-854e-87be-fe66, GHSA-3rqj-4qqw-jgwr.