Improper Certificate Validation Affecting gnutls package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-GNUTLS-16963999
- published28 May 2026
- disclosed29 Apr 2026
- creditOleh Konko
Introduced: 29 Apr 2026
CVE-2026-42012 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation due to improper handling of Uniform Resource Identifier (URI) and Service (SRV) Subject Alternative Names (SANs) in the certificate validation process. An attacker can intercept sensitive information or impersonate legitimate services by presenting a specially crafted certificate that causes the process to incorrectly fall back to checking DNS hostnames against the Common Name (CN).