Portainer: Path traversal in backup archive extraction allows arbitrary file write_CVE-2026-44885

{
    "lastseen": "",
    "description": "Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. From 2.33.0 to before 2.33.8, Portainer's backup restore feature accepts a .tar.gz archive and extracts it to a target directory on the server. The extraction function (ExtractTarGz in api/archive/targz.go) constructed output paths using filepath.Clean(filepath.Join(outputDirPath, header.Name)). This combination does not prevent directory traversal \u2014 a tar entry named ../../etc/cron.d/evil resolves to a path outside the extraction root, so a crafted archive can write files to arbitrary locations on the server filesystem. This vulnerability is fixed in 2.33.8.",
    "published": "2026-05-28T20:56:42.024Z",
    "modified": "2026-05-28T20:56:57.555Z",
    "type": "cve",
    "title": "Portainer: Path traversal in backup archive extraction allows arbitrary file write",
    "source": "GitHub_M",
    "references": "https://github.com/portainer/portainer/security/advisories/GHSA-m8fg-67j7-cx4v\nhttps://github.com/portainer/portainer-suite/pull/1875",
    "id": "CVE-2026-44885",
    "bulletinFamily": "",
    "cwe": [
        "CWE-22"
    ],
    "cvelist": null,
    "sourceData": "portainer portainer >= 2.33.0, < 2.33.8",
    "sourceHref": "",
    "cvss": {
        "score": 5.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "portainer",
    "version": ">= 2.33.0, < 2.33.8",
    "vendor": "portainer",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}