Improper Enforcement of Behavioral Workflow The advisory has been revoked - it doesn't affect any version of package botan (opens in a new tab)
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-DEBIAN12-BOTAN-15967755
- published10 Apr 2026
- disclosed7 Apr 2026
Introduced: 7 Apr 2026
CVE-2026-34582 (opens in a new tab)Amendment
The Debian security team deemed this advisory irrelevant for Debian:12.
NVD Description
Note: Versions mentioned in the description apply only to the upstream botan package and not the botan package as distributed by Debian.
Botan is a C++ cryptography library. Prior to version 3.11.1, the TLS 1.3 implementation allowed ApplicationData records to be processed prior to the Finished message being received. A server which is attempting to enforce client authentication via certificates can by bypassed by a client which entirely omits Certificate, CertificateVerify, and the Finished message and instead sends application data records. This vulnerability is fixed in 3.11.1.
References
- https://security-tracker.debian.org/tracker/CVE-2026-34582
- https://github.com/randombit/botan/security/advisories/GHSA-pxcj-9ppx-g86g
- https://access.redhat.com/security/cve/CVE-2026-34582
- https://bugzilla.redhat.com/show_bug.cgi?id=2456285
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34582.json