Improper Certificate Validation Affecting botan package, versions [3.11.0,3.11.1)
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-16032033
- published14 Apr 2026
- disclosed7 Apr 2026
- creditNicholas Carlini
Introduced: 7 Apr 2026
CVE-2026-34580 (opens in a new tab)How to fix?
Upgrade botan to version 3.11.1 or higher.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation due to improper validation in the certificate_known function. An attacker can bypass certificate trust verification by presenting an end entity certificate with a distinguished name and subject key identifier matching a trusted root, causing it to be accepted as a trusted root.