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CVE-2026-34582 Botan is a C++ cryptography library

Description

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.

Affected products and versions

Product Affected versions Fixed in
Botan 3.11 earliest → < 3.11.1 3.11.1
Red Hat Enterprise Linux 10 Versions not published

Other CVEs of Botan

The 15 CVEs of Botan →
CVE-2026-118769 Botan is a C++ cryptography library 9.2 Critical CVE-2026-118768 Botan is a C++ cryptography library 5.9 Medium CVE-2026-118767 Botan is a C++ cryptography library 4.8 Medium CVE-2026-118766 Botan: Online OCSP redirects enable blind requests to internal HTTP services 6.1 Medium
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