Improper Certificate Validation Affecting botan package, versions [,3.11.0)
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-BOTAN-15871026
- published1 Apr 2026
- disclosed30 Mar 2026
- creditHarutoKimura
Introduced: 30 Mar 2026
NewCVE-2026-32884 (opens in a new tab)How to fix?
Upgrade botan to version 3.11.0 or higher.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation in the processing of X.509 certificate paths with DNS name constraints when the end-entity certificate lacks a subject alternative name. An attacker can circumvent DNS name constraints by using a mixed-case value in the CN field, allowing certificates that should be excluded to be accepted due to a case-sensitive comparison.