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
2026-03-24T05:37:44Z
Modified
2026-08-12T16:09:40Z
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 
{
    "cna_assigner":  "GovTech CSG",
    "cwe_ids":  [
        "CWE-476"
    ],
    "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 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "2.4.0"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

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 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "327883460227041003938581001454226052239",
                "137206339826380335687601049620789308544",
                "102748940356720934504101352933406201149",
                "125427680454422080786647168918705589552",
                "102894536565226798908138128821872290776",
                "29180683381143016413189312719960988320",
                "85601148945432896720467462702975324428"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-4751-3f3c34ab",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/tmate-io/tmate/commit/5e00bfa5e137e76c81888727712ced2b3fd99f5b",
        "target":  {
            "file":  "tmate-session.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "300485992612120466588770494544055851682",
            "length":  551
        },
        "id":  "CVE-2026-4751-f36163cd",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/tmate-io/tmate/commit/5e00bfa5e137e76c81888727712ced2b3fd99f5b",
        "target":  {
            "file":  "tmate-session.c",
            "function":  "tmate_session_start"
        }
    }
]
vanir_signatures_modified 
"2026-08-12T16:09:40Z"