CVE-2026-3832 Redhat CVE debrief

Who should care

Organizations using GnuTLS-based TLS clients, especially environments that rely on OCSP verification for certificate revocation checks. Red Hat customers should also review the listed Red Hat advisories and affected product CPEs, including RHEL, OpenShift Container Platform, and hardened images where applicable.

Technical summary

The NVD record classifies the issue as CVSS 3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N with CWE-179. The flaw is described as a logic error in how GnuTLS processes multi-record OCSP responses during a TLS handshake. If OCSP verification is enabled, a client may accept a revoked server certificate after processing a specially crafted response. The source references an upstream GnuTLS issue and Red Hat advisories, indicating downstream product impact in addition to the upstream library.

Defensive priority

Priority should be moderate for systems that depend on OCSP-based certificate validation, because the direct impact is trust compromise rather than service outage. Even with a low CVSS score, this can matter in environments where certificate revocation is a security control.

Recommended defensive actions

• Review whether your systems use GnuTLS for TLS client connections and whether OCSP verification is enabled.
• Check vendor guidance and apply Red Hat advisory RHSA-2026:13274 or the relevant downstream fix when available.
• Monitor the Red Hat CVE page and the upstream GnuTLS issue tracker reference for remediation status.
• Where operationally acceptable, reduce reliance on OCSP-based acceptance decisions until patched packages are deployed.
• Validate that affected Red Hat platforms in your environment are covered by your patching and exception process, including RHEL 6/7/8/9/10, OpenShift Container Platform 4.0, and hardened images if used.

Evidence notes

The debrief is based on the supplied NVD CVE metadata and referenced Red Hat and GnuTLS links. The technical description, impact, CVSS vector, and CWE come from the NVD record. Impacted CPEs are taken from the NVD cpeCriteria list. The published timestamp used for timing context is 2026-04-30T18:16:30.433Z; the later modified timestamp is 2026-05-11T19:15:57.277Z. No exploit technique beyond the supplied description is included.

Official resources