Fission builder accepts arbitrary buildcmd strings from Environment.spec.builder.command, allowing the builder pod to invoke arbitrary executables_CVE-2026-46618

{
    "lastseen": "",
    "description": "Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.23.0, before the round-1 security sweep, pkg/builder/builder.go passed Environment.spec.builder.command directly into exec.Command(...) after a strings.Fields split, with no validation of the executable path or its arguments. A user who could create or update Environment CRDs in a namespace observed by the buildermgr could thereby point the builder pod at any executable inside the builder image (e.g. /bin/sh -c '...') and execute arbitrary code in the builder pod context. This issue has been patched in version 1.23.0.",
    "published": "2026-06-10T17:20:53.216Z",
    "modified": "2026-06-10T17:20:53.216Z",
    "type": "cve",
    "title": "Fission builder accepts arbitrary buildcmd strings from Environment.spec.builder.command,   allowing the builder pod to invoke arbitrary executables",
    "source": "GitHub_M",
    "references": "https://github.com/fission/fission/security/advisories/GHSA-7pjr-qpvh-m339\nhttps://github.com/fission/fission/pull/3364\nhttps://github.com/fission/fission/releases/tag/v1.23.0",
    "id": "CVE-2026-46618",
    "bulletinFamily": "",
    "cwe": [
        "CWE-78",
        "CWE-250",
        "CWE-269"
    ],
    "cvelist": null,
    "sourceData": "fission fission < 1.23.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.9,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "fission",
    "version": "< 1.23.0",
    "vendor": "fission",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}