MinIO is Vulnerable to SSE Metadata Injection via Replication Headers_CVE-2026-34204

{
    "lastseen": "",
    "description": "MinIO is a high-performance object storage system. Prior to version RELEASE.2026-03-26T21-24-40Z, a flaw in extractMetadataFromMime() allows any authenticated user with s3:PutObject permission to inject internal server-side encryption metadata into objects by sending crafted X-Minio-Replication-* headers on a normal PutObject request. This issue has been patched in version RELEASE.2026-03-26T21-24-40Z.",
    "published": "2026-03-31T19:30:31.057Z",
    "modified": "2026-04-01T13:42:45.444Z",
    "type": "cve",
    "title": "MinIO is Vulnerable to SSE Metadata Injection via Replication Headers",
    "source": "GitHub_M",
    "references": "https://github.com/minio/minio/security/advisories/GHSA-3rh2-v3gr-35p9",
    "id": "CVE-2026-34204",
    "bulletinFamily": "",
    "cwe": [
        "CWE-287"
    ],
    "cvelist": null,
    "sourceData": "minio minio < RELEASE.2026-03-26T21-24-40Z",
    "sourceHref": "",
    "cvss": {
        "score": 7.1,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "minio",
    "version": "< RELEASE.2026-03-26T21-24-40Z",
    "vendor": "minio",
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    "ai_score": 0
}