Improper Validation of Specified Quantity in Input 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-16964215
- published28 May 2026
- disclosed29 Apr 2026
- creditHaruto Kimura, Joshua Rogers
Introduced: 29 Apr 2026
CVE-2026-42013 (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 Validation of Specified Quantity in Input due to improper handling of oversized Subject Alternative Name fields during certificate validation. An attacker can bypass certificate validation by crafting a certificate with an excessively large Subject Alternative Name, causing the process to incorrectly fall back to the Common Name field and potentially enabling spoofing or man-in-the-middle attacks.