CVE-2026-34582
Botan is a C++ cryptography library. Prior to version 3.11.1, the TLS 1.3 implementation allowed ApplicationData records to be processed pri
CVSS
9.1
Critical
EPSS
0.2%
p14
KEV
—
Exploit Today
4
0-100
Published: Apr 7, 2026 · Last modified: Jul 15, 2026 · CWE-841 · CWE-166
0.2%EPSS · 30 days0.2%
2026-06-302026-07-18
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.
- github.comhttps://github.com/randombit/botan/security/advisories/GHSA-pxcj-9ppx-g86g
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-34582
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2456285
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34582.json
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