Bug 2509999 (CVE-2026-67294) - CVE-2026-67294 FreeRDP: FreeRDP: Server certificate validation bypass via improper Extended Key Usage (EKU) validation
Summary: CVE-2026-67294 FreeRDP: FreeRDP: Server certificate validation bypass via imp...
Keywords:
Status: NEW
Alias: CVE-2026-67294
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2510311 2510312
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-01 13:02 UTC by OSIDB Bzimport
Modified: 2026-08-03 07:43 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-01 13:02:33 UTC 
FreeRDP before 3.29.0 improperly validates the Extended Key Usage (EKU) purpose of the peer certificate during client-side server TLS authentication. In x509_utils_verify(), when server-purpose (X509_PURPOSE_SSL_SERVER) verification fails, the code falls back to client-purpose and any-purpose verification, so a trusted, hostname-matching certificate valid only for clientAuth can be accepted as the RDP server certificate. In environments relying on EKU separation between client and server certificates, this allows a clientAuth-only certificate issued by a trusted CA to bypass server certificate purpose validation.
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