apko dirFS has a symlink-following path traversal that allows multiple entry points to escape the build root_CVE-2026-42574

{
    "lastseen": "",
    "description": "apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before version 1.2.5, a crafted .apk could install a TypeSymlink tar entry whose target pointed outside the build root, and a subsequent directory-creation or file-write entry in the same or later archive could traverse that symlink to reach host paths the build user could write to. This issue has been patched in version 1.2.5.",
    "published": "2026-05-09T19:24:48.497Z",
    "modified": "2026-05-09T19:24:48.497Z",
    "type": "cve",
    "title": "apko dirFS has a symlink-following path traversal that allows multiple entry points to escape the build root",
    "source": "GitHub_M",
    "references": "https://github.com/chainguard-dev/apko/security/advisories/GHSA-qq3r-w4hj-gjp6\nhttps://github.com/chainguard-dev/apko/pull/2187\nhttps://github.com/chainguard-dev/apko/commit/f5a96e1299ac81c7ea9441705ec467688086f442\nhttps://github.com/chainguard-dev/apko/releases/tag/v1.2.5",
    "id": "CVE-2026-42574",
    "bulletinFamily": "",
    "cwe": [
        "CWE-22",
        "CWE-59"
    ],
    "cvelist": null,
    "sourceData": "chainguard-dev apko >= 0.14.8, < 1.2.5",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "apko",
    "version": ">= 0.14.8, < 1.2.5",
    "vendor": "chainguard-dev",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}