RustFS has IAM deny_only Short-Circuit that Allows Privilege Escalation via Service Account Minting_CVE-2026-22043

{
    "lastseen": "",
    "description": "RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.13 through 1.0.0-alpha.78, a flawed `deny_only` short-circuit in RustFS IAM allows a restricted service account or STS credential to self-issue an unrestricted service account, inheriting the parent\u2019s full privileges. This enables privilege escalation and bypass of session/inline policy restrictions. Version 1.0.0-alpha.79 fixes the issue.",
    "published": "2026-01-08T15:03:59.313Z",
    "modified": "2026-01-08T15:54:47.243Z",
    "type": "cve",
    "title": "RustFS has IAM deny_only Short-Circuit that Allows Privilege Escalation via Service Account Minting",
    "source": "GitHub_M",
    "references": "https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9",
    "id": "CVE-2026-22043",
    "bulletinFamily": "",
    "cwe": [
        "CWE-269",
        "CWE-284"
    ],
    "cvelist": null,
    "sourceData": "rustfs rustfs >= 1.0.0-alpha.13, < 1.0.0-alpha.79",
    "sourceHref": "",
    "cvss": {
        "score": 5.7,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
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            "privilegesRequired": "",
            "userInteraction": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "rustfs",
    "version": ">= 1.0.0-alpha.13, < 1.0.0-alpha.79",
    "vendor": "rustfs",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
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    "ai_version": "",
    "ai_score": 0
}