CVE-2026-3832
Gnutls: gnutls: security bypass allows acceptance of revoked server certificates via crafted ocsp response
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.
INFO
Published Date :
April 30, 2026, 6:16 p.m.
Last Modified :
May 11, 2026, 7:15 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-3832
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | 53f830b8-0a3f-465b-8143-3b8a9948e749 | ||||
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 3.1 | LOW | MITRE-CVE |
Solution
- Update GnuTLS to the latest version.
- Ensure OCSP verification is properly configured.
- Verify TLS handshake integrity post-update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-3832.
| URL | Resource |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:13274 | Third Party Advisory |
| https://access.redhat.com/security/cve/CVE-2026-3832 | Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2445762 | Issue Tracking Third Party Advisory |
| https://gitlab.com/gnutls/gnutls/-/issues/1801 | Exploit Issue Tracking Vendor Advisory |
| https://gitlab.com/gnutls/gnutls/-/issues/1801 | Exploit Issue Tracking Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-3832 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-3832
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-3832 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-3832 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 11, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* *cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:* Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:13274 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-3832 Types: Third Party Advisory Added Reference Type Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2445762 Types: Issue Tracking, Third Party Advisory Added Reference Type CISA-ADP: https://gitlab.com/gnutls/gnutls/-/issues/1801 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type Red Hat, Inc.: https://gitlab.com/gnutls/gnutls/-/issues/1801 Types: Exploit, Issue Tracking, Vendor Advisory -
CVE Modified by [email protected]
May. 03, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:13274 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 30, 2026
Action Type Old Value New Value Added Reference https://gitlab.com/gnutls/gnutls/-/issues/1801 -
New CVE Received by [email protected]
Apr. 30, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Added CWE CWE-179 Added Reference https://access.redhat.com/security/cve/CVE-2026-3832 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2445762 Added Reference https://gitlab.com/gnutls/gnutls/-/issues/1801