CVE-2026-3832

EUVD-2026-26402
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
3.7 LOW
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 20%
Affected Products (NVD)
VendorProductVersion
gnugnutls
-
redhathardened_images
-
redhatopenshift_container_platform
4.0
redhatenterprise_linux
6.0
redhatenterprise_linux
7.0
redhatenterprise_linux
8.0
redhatenterprise_linux
9.0
redhatenterprise_linux
10.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
gnutls28
bookworm
3.7.9-2+deb12u6
fixed
bookworm (security)
3.7.9-2+deb12u7
fixed
bullseye
3.7.1-5+deb11u5
fixed
bullseye (security)
3.7.1-5+deb11u10
fixed
forky
3.8.13-1
fixed
sid
3.8.13-1
fixed
trixie
vulnerable
trixie (security)
3.8.9-3+deb13u4
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
gnutls
RHEL 9
0:3.8.10-4.el9_8
fixed
gnutls-c
RHEL 9
0:3.8.10-4.el9_8
fixed
gnutls-dane
RHEL 9
0:3.8.10-4.el9_8
fixed
gnutls-devel
RHEL 9
0:3.8.10-4.el9_8
fixed
gnutls-utils
RHEL 9
0:3.8.10-4.el9_8
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
gnutls
Azure Linux 3.0
0:3.8.3-11.azl3
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://access.redhat.com/errata/RHSA-2026:13274
https://access.redhat.com/errata/RHSA-2026:20612
https://access.redhat.com/errata/RHSA-2026:20613
https://access.redhat.com/security/cve/CVE-2026-3832
https://bugzilla.redhat.com/show_bug.cgi?id=2445762
https://gitlab.com/gnutls/gnutls/-/issues/1801
https://gitlab.com/gnutls/gnutls/-/issues/1801