9.1

CVE-2026-34582

Botan has a TLS 1.3 certificate authentication bypass

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Botan Project ≫ Botan Version >= 3.0.0 <= 3.11.0
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.23% 0.141
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 9.1 3.9 5.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
security-advisories@github.com 8.7 0 0
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
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 9.1 3.9 5.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-166 Improper Handling of Missing Special Element

The product receives input from an upstream component, but it does not handle or incorrectly handles when an expected special element is missing.

CWE-841 Improper Enforcement of Behavioral Workflow

The product supports a session in which more than one behavior must be performed by an actor, but it does not properly ensure that the actor performs the behaviors in the required sequence.

https://github.com/randombit/botan/security/advisories/GHSA-pxcj-9ppx-g86g
Vendor Advisory
Mitigation
https://access.redhat.com/security/cve/CVE-2026-34582
https://bugzilla.redhat.com/show_bug.cgi?id=2456285
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34582.json