{"id":"EUVD-2026-17600","revision":null,"records":[{"revision":"9bc679df812848f1ae2e523a019501f7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-34204","aliases":[],"title":"MinIO is Vulnerable to SSE Metadata Injection via Replication Headers","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.","state":0,"publishedAt":"2026-03-31T19:30:31.057+00:00","modifiedAt":"2026-04-01T13:42:45.444+00:00","affected":[{"ecosystem":"Vendor product","name":"minio","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"minio\",\n                    \"product\": \"minio\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< RELEASE.2026-03-26T21-24-40Z\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":7.1,"severity":"HIGH"}],"references":["https://github.com/minio/minio/security/advisories/GHSA-3rh2-v3gr-35p9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-34204","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-34204","identifiers":["CVE-2026-34204"]},"retained":false,"historicalAffected":[]},{"revision":"14c1ab2cc4de45d0b5a1d347e55e0a9e","observedAt":"2026-11-11T09:27:37.758+00:00","statement":{"source":"euvd","id":"EUVD-2026-17600","aliases":["CVE-2026-34204","GHSA-3rh2-v3gr-35p9"],"title":"MinIO is a high-performance object storage system. 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Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-34204","identifiers":["CVE-2026-34204"]},"retained":false,"historicalAffected":[]},{"revision":"80d7f0a217974948b6fefd6fe7b3056c","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-3rh2-v3gr-35p9","aliases":["CVE-2026-34204","GO-2026-4896"],"title":"MinIO is Vulnerable to SSE Metadata Injection via Replication Headers","description":"## Impact\n\n_What kind of vulnerability is it? Who is impacted?_\n\nA 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. The server unconditionally maps these headers to `X-Minio-Internal-*` encryption metadata without verifying that the request is a legitimate replication request. Objects written this way carry bogus encryption keys and become **permanently unreadable** through the S3 API.\n\nAny authenticated user or service with `s3:PutObject` permission on any bucket can make objects permanently unreadable by injecting fake SSE encryption metadata. The attacker sends a standard PutObject request with `X-Minio-Replication-Server-Side-Encryption-*` headers but **without** the `X-Minio-Source-Replication-Request` header that marks legitimate replication traffic. The server maps these headers to internal encryption metadata (`X-Minio-Internal-Server-Side-Encryption-Sealed-Key`, etc.), causing all subsequent GetObject and HeadObject calls to treat the object as encrypted with keys that do not exist.\n\nThis is a targeted denial-of-service vulnerability. An attacker can selectively corrupt individual objects or entire buckets. The `ReplicateObjectAction` IAM permission is never checked because the request is a normal PutObject, not a replication request.\n\n**Affected component:** `cmd/handler-utils.go`, function `extractMetadataFromMime()`.\n\n## Affected Versions\n\nAll MinIO releases through the final release of the minio/minio open-source project.\n\nThe vulnerability was introduced in commit `468a9fae83e965ecefa1c1fdc2fc57b84ece95b0` (\"Enable replication of SSE-C objects\", [PR #19107](https://github.com/minio/minio/pull/19107), 2024-03-28). The first affected release is `RELEASE.2024-03-30T09-41-56Z`.\n\n## Patches\n\n**Fixed in**: MinIO AIStor RELEASE.2026-03-26T21-24-40Z\n\n### Binary Downloads\n\n| Platform | Architecture | Download |\n| -------- | ------------ | -------- |\n| Linux | amd64 | [minio](https://dl.min.io/aistor/minio/release/linux-amd64/minio) |\n| Linux | arm64 | [minio](https://dl.min.io/aistor/minio/release/linux-arm64/minio) |\n| macOS | arm64 | [minio](https://dl.min.io/aistor/minio/release/darwin-arm64/minio) |\n| macOS | amd64 | [minio](https://dl.min.io/aistor/minio/release/darwin-amd64/minio) |\n| Windows | amd64 | [minio.exe](https://dl.min.io/aistor/minio/release/windows-amd64/minio.exe) |\n\n### FIPS Binaries\n\n| Platform | Architecture | Download |\n| -------- | ------------ | -------- |\n| Linux | amd64 | [minio.fips](https://dl.min.io/aistor/minio/release/linux-amd64/minio.fips) |\n| Linux | arm64 | [minio.fips](https://dl.min.io/aistor/minio/release/linux-arm64/minio.fips) |\n\n### Package Downloads\n\n| Format | Architecture | Download |\n| ------ | ------------ | -------- |\n| DEB | amd64 | [minio_20260326212440.0.0_amd64.deb](https://dl.min.io/aistor/minio/release/linux-amd64/minio_20260326212440.0.0_amd64.deb) |\n| DEB | arm64 | [minio_20260326212440.0.0_arm64.deb](https://dl.min.io/aistor/minio/release/linux-arm64/minio_20260326212440.0.0_arm64.deb) |\n| RPM | amd64 | [minio-20260326212440.0.0-1.x86_64.rpm](https://dl.min.io/aistor/minio/release/linux-amd64/minio-20260326212440.0.0-1.x86_64.rpm) |\n| RPM | arm64 | [minio-20260326212440.0.0-1.aarch64.rpm](https://dl.min.io/aistor/minio/release/linux-arm64/minio-20260326212440.0.0-1.aarch64.rpm) |\n\n### Container Images\n\n```bash\n# Standard\ndocker pull quay.io/minio/aistor/minio:RELEASE.2026-03-26T21-24-40Z\npodman pull quay.io/minio/aistor/minio:RELEASE.2026-03-26T21-24-40Z\n\n# FIPS\ndocker pull quay.io/minio/aistor/minio:RELEASE.2026-03-26T21-24-40Z.fips\npodman pull quay.io/minio/aistor/minio:RELEASE.2026-03-26T21-24-40Z.fips\n```\n\n### Homebrew (macOS)\n\n```bash\nbrew install minio/aistor/minio\n```\n\n## Workarounds\n\n[Users of the open-source `minio/minio` project should upgrade to MinIO AIStor `RELEASE.2026-03-26T21-24-40Z` or later.](https://docs.min.io/enterprise/aistor-object-store/upgrade-aistor-server/community-edition/)\n\nIf upgrading is not immediately possible:\n\n- **Restrict replication headers at a reverse proxy / load balancer.** Drop or reject any request containing `X-Minio-Replication-Server-Side-Encryption-*` headers that does not also carry `X-Minio-Source-Replication-Request`. This blocks the injection path without modifying the server.\n\n- **Audit IAM policies.** Limit `s3:PutObject` grants to trusted principals. While this reduces the attack surface, it does not eliminate the vulnerability since any authorized user can exploit it.\n\n## References\n\n- Introducing commit: [`468a9fae8`](https://github.com/minio/minio/commit/468a9fae83e965ecefa1c1fdc2fc57b84ece95b0) ([PR #19107](https://github.com/minio/minio/pull/19107))\n- [MinIO AIStor](https://min.io/aistor)","state":0,"publishedAt":"2026-03-27T22:26:05+00:00","modifiedAt":"2026-10-08T08:11:01.8000464+00:00","affected":[{"ecosystem":"Go","name":"github.com/minio/minio","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.0.0-20240328174456-468a9fae83e9"},{"kind":"last_affected","version":"0.0.0-20260212201848-7aac2a2c5b7c"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","score":null,"severity":null},{"system":"CVSS_V4","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","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/minio/minio/security/advisories/GHSA-3rh2-v3gr-35p9","https://nvd.nist.gov/vuln/detail/CVE-2026-34204","https://docs.min.io/enterprise/aistor-object-store/upgrade-aistor-server/community-edition","https://github.com/minio/minio"],"sourceUrl":"https://github.com/advisories/GHSA-3rh2-v3gr-35p9","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-3rh2-v3gr-35p9","identifiers":["GHSA-3rh2-v3gr-35p9","CVE-2026-34204","GO-2026-4896"]},"retained":false,"historicalAffected":[]},{"revision":"1c7632483c114115ad0185e7902ee1e5","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-4896","aliases":["CVE-2026-34204","GHSA-3rh2-v3gr-35p9"],"title":"MinIO is Vulnerable to SSE Metadata Injection via Replication Headers in github.com/minio/minio","description":"MinIO is Vulnerable to SSE Metadata Injection via Replication Headers in github.com/minio/minio","state":0,"publishedAt":"2026-04-02T18:42:30+00:00","modifiedAt":"2026-10-08T08:11:01.8000464+00:00","affected":[{"ecosystem":"Go","name":"github.com/minio/minio","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.0.0-20240328174456-468a9fae83e9"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/minio/minio/security/advisories/GHSA-3rh2-v3gr-35p9","https://docs.min.io/enterprise/aistor-object-store/upgrade-aistor-server/community-edition"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-4896","license":"OSV · upstream source license applies","key":"osv:GO-2026-4896","identifiers":["GO-2026-4896","CVE-2026-34204","GHSA-3rh2-v3gr-35p9"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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