CVE-2026-72746

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Source
https://cve.org/CVERecord?id=CVE-2026-72746
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72746.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-72746
Aliases
Downstream
Published
2026-08-11T12:17:00.687Z
Modified
2026-08-12T04:26:14.045159071Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
FreeRDP before 3.30.0 RDSTLS Server Authentication Bypass via PDU-type Confusion
Details

FreeRDP before 3.30.0 contains a server-side authentication bypass in the RDSTLS handshake. When a server is configured with RdstlsSecurity = TRUE, the handshake dispatches inbound PDUs based solely on the attacker-supplied wire pduType without verifying that the received PDU is the one required at the current step. Because the rdpRdstls object is calloc-zeroed, its resultCode defaults to 0 (RDSTLSRESULTSUCCESS). An unauthenticated remote client can send a Capabilities PDU instead of the required Authentication Request PDU; rdstlsprocesscapabilities() returns success without ever setting resultCode, so the server responds with an AUTHRSP carrying resultCode SUCCESS and treats the session as authenticated without evaluating any password, redirection GUID, or auto-reconnect cookie. This affects the released FreeRDP 3.x series (e.g., 3.27.1) and master HEAD; at the time of the advisory no patched version was available.

Database specific 
{
    "cwe_ids": [
        "CWE-287"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72746.json",
    "cna_assigner": "VulnCheck"
}
References

Affected packages

Git / github.com/freerdp/freerdp

Affected ranges

Type
GIT
Repo
https://github.com/freerdp/freerdp
Events
Introduced
a34fa7c49d2a39aa49ace1d7bea9656912d8c7cb
Fixed
6b107f0aadbabc47941c5a5b893b88c01792af6d
Database specific
Show details 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "3.0.0"
        },
        {
            "fixed": "3.30.0"
        }
    ]
}

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-2026-72746.json"