CVE-2026-67293 Details
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.
A vulnerability exists in FreeRDP versions prior to 3.29.0, specifically in versions through 3.28.0, due to improper validation of certificate hostnames. The issue arises in the TLS hostname matcher, which incorrectly accepts wildcard certificates for multi-label subdomains. For instance, a certificate for *.example.com is accepted for a.b.example.com, while OpenSSL's X509_check_host() correctly rejects it. This flaw undermines TLS server authentication when wildcard certificates are involved.
Users can upgrade to FreeRDP version 3.29.0 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 5, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-295 | Improper Certificate Validation | [email protected] |
Affected Products
No affected product data is available for this CVE.
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 5, 2026 | CVE Modified | CISA-ADP |
| Aug 5, 2026 | CVE Modified | CISA-ADP |
| Aug 3, 2026 | CVE Modified | CISA-ADP |
| Aug 1, 2026 | New CVE Received | [email protected] |