CVE-2026-4751

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Source
https://cve.org/CVERecord?id=CVE-2026-4751
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4751.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-4751
Downstream
Published
2026-03-24T05:37:44.416Z
Modified
2026-08-12T16:09:40.839800Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
NULL Pointer Dereference in tmate-io tmate
Details

NULL Pointer Dereference vulnerability in tmate-io tmate.This issue affects tmate: before 2.4.0.

Database specific 
{
    "cwe_ids": [
        "CWE-476"
    ],
    "cna_assigner": "GovTech CSG",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4751.json"
}
References

Affected packages

Git / github.com/tmate-io/tmate

Affected ranges

Type
GIT
Repo
https://github.com/tmate-io/tmate
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
5e00bfa5e137e76c81888727712ced2b3fd99f5b
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.4.0"
        }
    ]
}

Affected versions

1.*
1.8
1.8.10
1.8.3
1.8.4
1.8.5
1.8.6
1.8.7
1.8.8
1.8.9
1.8.9a
2.*
2.2.0
2.2.1
2.3.0
2.3.1
Other
base
to_copy

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4751.json"
vanir_signatures 
[
    {
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "327883460227041003938581001454226052239",
                "137206339826380335687601049620789308544",
                "102748940356720934504101352933406201149",
                "125427680454422080786647168918705589552",
                "102894536565226798908138128821872290776",
                "29180683381143016413189312719960988320",
                "85601148945432896720467462702975324428"
            ]
        },
        "target": {
            "file": "tmate-session.c"
        },
        "source": "https://github.com/tmate-io/tmate/commit/5e00bfa5e137e76c81888727712ced2b3fd99f5b",
        "signature_version": "v1",
        "id": "CVE-2026-4751-3f3c34ab",
        "deprecated": false
    },
    {
        "signature_type": "Function",
        "digest": {
            "function_hash": "300485992612120466588770494544055851682",
            "length": 551.0
        },
        "target": {
            "function": "tmate_session_start",
            "file": "tmate-session.c"
        },
        "source": "https://github.com/tmate-io/tmate/commit/5e00bfa5e137e76c81888727712ced2b3fd99f5b",
        "signature_version": "v1",
        "id": "CVE-2026-4751-f36163cd",
        "deprecated": false
    }
]
vanir_signatures_modified 
"2026-08-12T16:09:40Z"