CVE-2026-3832

Gnutls: gnutls: security bypass allows acceptance of revoked server certificates via crafted ocsp response

State: Published
Severity: 3.7 Low
Published: Apr 30, 2026
Updated: Oct 14, 2026
Reserved: Mar 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	3.7 Low	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N	redhat

Weaknesses

CWE-179 Incorrect Behavior Order: Early Validation

Affected Products

Product	Versions
gnutls	before 3.8.13Affected
Red Hat Enterprise Linux 10Red Hat	0:3.8.10-4.el10_2 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat	0:3.8.9-9.el10_0.19 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:3.8.10-4.el9_8 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:3.8.10-4.el9_8 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.17Red Hat	1791371080 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.17Red Hat	1791371069 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.17Red Hat	1791788287 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.17Red Hat	1791970484 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791459707 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791459711 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791459759 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1789029076 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791966259 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.20Red Hat	1790598593 and laterNot affected
Red Hat Discovery 2Red Hat	1782159791 and laterNot affected
Red Hat Discovery 2Red Hat	1782166952 and laterNot affected
Red Hat Hardened ImagesRed Hat	3.8.13-1.hum1 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1781525684 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1781525671 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1781525693 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1781525739 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1787241211 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1787135742 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1787241260 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 8Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat

References

RHSA-2026:13274vendor-advisory
RHSA-2026:20612vendor-advisory
RHSA-2026:20613vendor-advisory
RHSA-2026:26319vendor-advisory
RHSA-2026:26409vendor-advisory
RHSA-2026:29197vendor-advisory
RHSA-2026:58981vendor-advisory
RHSA-2026:72502vendor-advisory
RHSA-2026:82304vendor-advisory
RHSA-2026:82322vendor-advisory
RHSA-2026:82347vendor-advisory
RHSA-2026:82354vendor-advisory
RHSA-2026:82372vendor-advisory
RHSA-2026:82857vendor-advisory
RHSA-2026:82888vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-3832vdb-entry
RHBZ#2445762issue-tracking
https://gitlab.com/gnutls/gnutls/-/issues/1801

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