CVE-2026-91948

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Source
https://cve.org/CVERecord?id=CVE-2026-91948
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91948.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-91948
Aliases
  • GHSA-9jcm-x588-gh26
Downstream
Published
2026-09-15T15:18:06Z
Modified
2026-09-17T03:47:20Z
Severity
  • 7.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
FreeRDP before 3.31.0 Out-of-bounds Write via SHOW_PROTOCOL
Details

FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in server-side static virtual channel handling when CHANNEL_OPTION_SHOW_PROTOCOL is enabled. Authenticated clients can queue oversized channel messages that cause buffer underflow and corrupt heap memory including live pointers, potentially enabling code execution.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-191"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91948.json"
}
References

Affected packages

Git / github.com/freerdp/freerdp

Affected ranges

Type
GIT
Repo
https://github.com/freerdp/freerdp
Events
Introduced
5370fb26fbf034ecd11d3026b6ad639b5fff493f
Fixed
aa8650b300aa4cabd85d9c72b431301509b9043f
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "3.28.0"
        },
        {
            "fixed": "3.31.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91948.json"