JLSEC-2026-1264

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Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-1264.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1264.json

JSON Data

https://api.osv.dev/v1/vulns/JLSEC-2026-1264

Upstream

CVE-2026-41991

EUVD-2026-40068

GHSA-67v8-88jf-4x6q

Published

2026-08-12T16:09:57Z

Modified

2026-08-12T16:28:54Z

Severity

4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N (Source: NVD) CVSS Calculator
2.0 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X (Source: CNA) CVSS Calculator

Summary

GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file...

Details

GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file handling. When the mktemp utility is not available in the user’s PATH, gzexe falls back to constructing a temporary file path based solely on the process ID (PID). This predictable filename is created without exclusive access or existence checks. A local attacker can pre‑create the predicted temporary file path as a symbolic link pointing to an arbitrary file writable by the victim. When gzexe runs, it follows the symlink and overwrites the target file, resulting in a time‑of‑check to time‑of‑use (TOCTOU) condition that allows arbitrary file overwrite.

This issue has been fixed in the commit 4e6f8b24ab823146ab8776f0b7fe486ab34d4269

Database specific

{
    "license": "CC-BY-4.0",
    "sources": [
        {
            "database_specific": {
                "status": "Analyzed"
            },
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41991",
            "id": "CVE-2026-41991",
            "imported": "2026-08-12T14:36:31.587Z",
            "modified": "2026-07-01T14:02:24.450Z",
            "published": "2026-06-29T12:16:29.770Z",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-41991"
        },
        {
            "html_url": "https://github.com/advisories/GHSA-67v8-88jf-4x6q",
            "id": "GHSA-67v8-88jf-4x6q",
            "imported": "2026-08-12T14:36:35.052Z",
            "modified": "2026-07-01T15:34:56Z",
            "published": "2026-06-29T12:31:44Z",
            "url": "https://api.github.com/advisories/GHSA-67v8-88jf-4x6q"
        },
        {
            "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-40068",
            "id": "EUVD-2026-40068",
            "imported": "2026-08-12T14:36:33.062Z",
            "modified": "2026-06-29T13:31:46Z",
            "published": "2026-06-29T10:15:50Z",
            "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-40068"
        }
    ]
}

References

Affected packages

Julia / Gzip_jll

Package

Name: Gzip_jll
Purl: pkg:julia/Gzip_jll?uuid=be1be57a-8558-53c3-a7e5-50095f79957e

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Database specific

source

"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1264.json"