Improper Certificate Validation Affecting freerdp package, versions <2:2.11.7-1.amzn2.0.14


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.24% (14th percentile)

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  • Snyk IDSNYK-AMZN2-FREERDP-19457177
  • published1 Sept 2026
  • disclosed1 Aug 2026

Introduced: 1 Aug 2026

CVE-2026-67293  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 freerdp to version 2:2.11.7-1.amzn2.0.14 or higher.
This issue was patched in ALAS2-2026-3887.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp package and not the freerdp package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1