---
id: CVE-2026-67293
title: >-
  FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains an improper
  certificate hostname validation vulnerability
summary: >-
  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 *.exampl…
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N'
cwe:
  - CWE-295
published: '2026-08-01'
updated: '2026-08-01'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67293'
references:
  - url: >-
      https://github.com/FreeRDP/FreeRDP/commit/f3b4347105114fe7453828736bea069999af319f
    label: disclosure@vulncheck.com
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5wr6-8m8j-3h7f'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-before-improper-certificate-hostname-validation
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-08-02T05:17:49.523Z'
epss: 0.00166
epssPercentile: 0.06221
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.