CVE-2026-67293 · Symaro Security Advisory

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.

Severity (CVSS)

Base score	9.3
Severity	Critical
Version	CVSS 4.0
Vector	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Provided by	CNA

Weaknesses

CWE-295 — Improper Certificate Validation

Affected products

Vendor	Product	Versions
FreeRDP	FreeRDP	0 to <3.29.0; 3.29.0

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5wr6-8m8j-3h7f (vendor-advisory)
https://github.com/FreeRDP/FreeRDP/commit/f3b4347105114fe7453828736bea069999af319f (patch)
https://www.vulncheck.com/advisories/freerdp-before-improper-certificate-hostname-validation (third-party-advisory)

Authoritative sources

This page is a snapshot. For the latest enrichment and updates, view the record on CVE.org or the NVD.

Generated from the official CVE List on 02 Aug 2026 07:05 UTC.