Bug 2533925 (CVE-2026-91949) - CVE-2026-91949 freerdp: FreeRDP 3.0.0 through 3.30.0 Protocol Negotiation Bypass
Summary: CVE-2026-91949 freerdp: FreeRDP 3.0.0 through 3.30.0 Protocol Negotiation Bypass
Keywords:
Status: NEW
Alias: CVE-2026-91949
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2537354
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-15 15:51 UTC by OSIDB Bzimport
Modified: 2026-10-01 13:01 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:73979 0 None None None 2026-09-30 14:36:50 UTC
Red Hat Product Errata RHSA-2026:74471 0 None None None 2026-10-01 13:01:56 UTC

Description OSIDB Bzimport 2026-09-15 15:51:14 UTC 
FreeRDP server versions before 3.31.0 contain a protocol negotiation bypass vulnerability that allows unauthenticated attackers to establish RDSTLS connections despite server policy disabling them. Attackers can send incompatible protocol requests, receive negotiation failures, then complete TLS handshake and enter RDSTLS to bypass pre-authentication transport restrictions.
Comment 1 Jon Orris 2026-09-30 14:36:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:73979 https://access.redhat.com/errata/RHSA-2026:73979
Comment 2 Jon Orris 2026-10-01 13:01:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:74471 https://access.redhat.com/errata/RHSA-2026:74471
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