Improper Enforcement of Behavioral Workflow Affecting botan package, versions [,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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Start learning- Snyk IDSNYK-CONAN-BOTAN-16032031
- published14 Apr 2026
- disclosed7 Apr 2026
- creditBen Smyth
Introduced: 7 Apr 2026
CVE-2026-34582 (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 Enforcement of Behavioral Workflow in the TLS 1.3 implementation, which processes ApplicationData records before receiving the Finished message. An attacker can bypass certificate-based client authentication by omitting the Certificate, CertificateVerify, and Finished messages and sending application data records instead.