CVE-2026-34582
Botan has a TLS 1.3 certificate authentication bypass
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:HConfidentialityHigh
I:HIntegrityHigh
A:NAvailabilityNone
Weaknesses
Affected Products
botan project
oss-projectaka botan
randombit
oss-project·DEaka botan
Exploitability
Official Patch Available
Workaround Available
References
https://github.com/randombit/botan/security/advisories/GHSA-pxcj-9ppx-g86g
github.com
https://access.redhat.com/security/cve/CVE-2026-34582
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2456285
bugzilla.redhat.com
and 1 more references View all →
Unlock Complete Vulnerability Intelligence
Get the full picture for CVE-2026-34582 and every CVE in our database. Create a free account — no credit card required.
Create Free AccountPlain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows