CVE-2026-3832Gnutls: gnutls: security bypass allows acceptance of revoked server certificates via crafted ocsp response
Updated under an hour ago ()
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It affects Red Hat Enterprise Linux 10 and 9 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 3.7 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-179
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:3.8.10-4.el10_2 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 0:3.8.9-9.el10_0.19 not affected | CNA record |
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 redhat:cert_manager | from 1791371080 not affected | CNA record |
Red Hat Red Hat Discovery 2 redhat:discovery | from 1782159791 not affected | CNA record |
Red Hat Red Hat Hardened Images redhat:hummingbird | from 3.8.13-1.hum1 not affected | CNA record |
Red Hat Red Hat Update Infrastructure 5 redhat:rhui | from 1781525684 not affected | CNA record |
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift | 4 | CNA record |
gnu gnutls gnu:gnutls | all versions | NVD |
redhat hardened_images redhat:hardened_images | all versions | NVD |
redhat openshift_container_platform redhat:openshift_container_platform | 4.0 | NVD |
redhat enterprise_linux redhat:enterprise_linux | 6.0; 7.0; 8.0; 9.0; 10.0 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:13274vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2026:20612vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:20613vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:26319vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:26409vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:29197vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:58981vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:72502vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:82304vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:82322vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:82347vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:82354vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:82372vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:82857vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:82888vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-3832vdb-entry, x-refsource-redhat, third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2445762issue-tracking, x-refsource-redhat, third-party-advisory
- https://gitlab.com/gnutls/gnutls/-/issues/1801exploit, issue-tracking, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.