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Vulnerability record · CVE-2026-3832 · published 30 April 2026

CVE-2026-3832: Gnutls vulnerability

Gnu · Gnutls

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.

3.7 CVSS 3.1 Low EPSS 0.85% · top 43.5% CWE-179 · CWE-179
3.7CVSS 3.1 base score
0.85%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
11References, 2 tagged exploit
1 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:13274 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:20612
https://access.redhat.com/errata/RHSA-2026:20613
https://access.redhat.com/errata/RHSA-2026:26319
https://access.redhat.com/errata/RHSA-2026:26409
https://access.redhat.com/errata/RHSA-2026:29197
https://access.redhat.com/errata/RHSA-2026:58981
https://access.redhat.com/security/cve/CVE-2026-3832 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2445762 Issue TrackingThird Party Advisory
https://gitlab.com/gnutls/gnutls/-/issues/1801 ExploitIssue TrackingVendor Advisory
https://gitlab.com/gnutls/gnutls/-/issues/1801 ExploitIssue TrackingVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-3832), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.