Microsoft APM: Windows absolute-path tar member overwrite during legacy-bundle probing in `apm install`_CVE-2026-46383

{
    "lastseen": "",
    "description": "Microsoft APM is an open-source, community-driven dependency manager for AI agents. Prior to 0.13.0, Microsoft APM contains a Windows-specific archive extraction boundary failure in the legacy-bundle probe used by apm install <bundle> on supported Python 3.10 and 3.11 runtimes. When apm install is given a local .tar.gz that is not recognized as a plugin-format bundle, APM probes whether it is a legacy --format apm bundle. On Python versions earlier than 3.12, that probe extracts untrusted tar members with raw tar.extractall() without rejecting Windows absolute member names such as D:/.... This vulnerability is fixed in 0.13.0.",
    "published": "2026-05-15T16:04:24.050Z",
    "modified": "2026-05-15T16:04:24.050Z",
    "type": "cve",
    "title": "Microsoft APM: Windows absolute-path tar member overwrite during legacy-bundle probing in `apm install`",
    "source": "GitHub_M",
    "references": "https://github.com/microsoft/apm/security/advisories/GHSA-mq5j-pw29-jcv3",
    "id": "CVE-2026-46383",
    "bulletinFamily": "",
    "cwe": [
        "CWE-22",
        "CWE-73"
    ],
    "cvelist": null,
    "sourceData": "microsoft apm < 0.13.0",
    "sourceHref": "",
    "cvss": {
        "score": 5.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "apm",
    "version": "< 0.13.0",
    "vendor": "microsoft",
    "ai_description": "",
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    "ai_product": "",
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    "ai_score": 0
}