CVE-2026-91949

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Source
https://cve.org/CVERecord?id=CVE-2026-91949
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91949.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-91949
Aliases
  • GHSA-x7v6-xfx3-52j6
Downstream
Published
2026-09-15T15:18:07Z
Modified
2026-09-17T03:47:20Z
Severity
  • 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N CVSS Calculator
Summary
FreeRDP 3.0.0 through 3.30.0 Protocol Negotiation Bypass
Details

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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-693"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91949.json"
}
References

Affected packages

Git / github.com/freerdp/freerdp

Affected ranges

Type
GIT
Repo
https://github.com/freerdp/freerdp
Events
Introduced
a34fa7c49d2a39aa49ace1d7bea9656912d8c7cb
Fixed
aa8650b300aa4cabd85d9c72b431301509b9043f
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "3.0.0"
        },
        {
            "fixed": "3.31.0"
        },
        {
            "introduced": "0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

3.*
3.0.0
3.1.0
3.2.0
3.3.0
3.4.0
3.5.0
3.5.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91949.json"