CVE-2026-67293

MEDIUM

FreeRDP before 3.29.0 Improper Certificate Hostname Validation

Title source: cna
STIX 2.1

Description

FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains an improper certificate hostname validation vulnerability. The TLS hostname matcher (tls_match_hostname() in libfreerdp/crypto/tls.c) treats a wildcard pattern such as *.example.com as matching any hostname ending in .example.com, so it incorrectly accepts a wildcard certificate for multi-label subdomains like a.b.example.com (which OpenSSL's X509_check_host() rejects). This weakens TLS server authentication under wildcard-certificate conditions.

References (3)

Core 3
Core References
Third Party Advisory third-party-advisory
VulnCheck Advisory: FreeRDP before 3.29.0 Improper Certificate Hostname Validation
https://www.vulncheck.com/advisories/freerdp-before-improper-certificate-hostname-validation
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-5wr6-8m8j-3h7f)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5wr6-8m8j-3h7f

Scores

CVSS v3 4.2
EPSS 0.0017
EPSS Percentile 6.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-295
Status published
Products (2)
FreeRDP/FreeRDP < 3.29.0
FreeRDP/FreeRDP 3.29.0
Published Aug 01, 2026
Tracked Since Aug 01, 2026