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Generated remediation guidance and an executive summary. No account required.
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.
Use CWE-841, Botan Project vendor hub and Botan product page to widen CVE-2026-34582 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2021-24115, CVE-2026-34580 and CVE-2022-43705 for nearby disclosures in the same product family.