CVE-2026-55194

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Source
https://cve.org/CVERecord?id=CVE-2026-55194
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55194.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55194
Aliases
  • GHSA-9gxm-3mf5-f5cx
Downstream
Related
Published
2026-08-19T17:50:30.158Z
Modified
2026-08-22T09:15:53.139545Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
FreeRDPHeap-buffer-overflow write in TS Gateway RPC RESPONSE reassembly due to alloc_hint capacity mismatch
Details

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpcclientrecvfragment in libfreerdp/core/gateway/rpcclient.c ensures the response reassembly stream capacity using only the server-declared allochint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPERESPONSE with a small allochint and a much larger fraglength, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55194.json"
}
References

Affected packages

Git / github.com/freerdp/freerdp

Affected ranges

Type
GIT
Repo
https://github.com/freerdp/freerdp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a
Fixed
4f72b0979892352ff501e84d99832dc3bdc86a53
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.27.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

1.*
1.0-beta1
1.0-beta2
1.0-beta4
1.0-beta5
1.0.0
1.0.1
1.1.0-beta+2013071101
1.1.0-beta1
1.1.0-beta1+android2
1.1.0-beta1+android3
1.1.0-beta1+android4
1.1.0-beta1+android5
1.1.0-beta1+ios1
1.1.0-beta1+ios2
1.1.0-beta1+ios3
1.1.0-beta1+ios4
1.2.0-beta1+android7
1.2.0-beta1+android9
2.*
2.0.0
2.0.0-beta1+android10
2.0.0-beta1+android11
2.0.0-rc0
2.0.0-rc1
2.0.0-rc2
2.0.0-rc3
2.0.0-rc4
3.*
3.0.0
3.0.0-beta1
3.0.0-beta2
3.0.0-beta3
3.0.0-beta4
3.0.0-rc0
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-2026-55194.json"
vanir_signatures 
[
    {
        "target": {
            "file": "libfreerdp/core/gateway/rpc_client.c"
        },
        "deprecated": false,
        "source": "https://github.com/freerdp/freerdp/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a",
        "id": "CVE-2026-55194-1135be41",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "178510192357835021182886470464668505071",
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                "251726426713813216121392694793098835002",
                "189399201384041370955017474398983372256"
            ]
        },
        "signature_type": "Line"
    },
    {
        "target": {
            "function": "rpc_client_recv_fragment",
            "file": "libfreerdp/core/gateway/rpc_client.c"
        },
        "deprecated": false,
        "source": "https://github.com/freerdp/freerdp/commit/9f2da52c2341cc14a96ad12e69c5b83d0bcd8b5a",
        "id": "CVE-2026-55194-434a0f63",
        "signature_version": "v1",
        "digest": {
            "length": 4277.0,
            "function_hash": "268686869839184305443410432979742499577"
        },
        "signature_type": "Function"
    }
]
vanir_signatures_modified 
"2026-08-22T09:15:53Z"