CVE-2026-34582
HIGH EPSS 9.7%
Published Apr 7, 20262mo ago · Modified Jun 17, 20262w ago
8.7 CVSS 4.0
Published Apr 7, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
9.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-841
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| botan_project | botan | * | ≥3.0.0 – ≤3.11.0 |
References 1
- github.com https://github.com/randombit/botan/security/advisories/GHSA-pxcj-9ppx-g86g
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.