{"id":"CVE-2026-34204","aliases":["GHSA-3rh2-v3gr-35p9","GO-2026-4896"],"url":"https://o3.security/vulnerability/CVE-2026-34204","summary":"MinIO is Vulnerable to SSE Metadata Injection via Replication Headers","details":"MinIO is a high-performance object storage system. Prior to version 2026.03.26, 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 2026.03.26.","published":"2026-04-06T09:26:13.602Z","modified":"2026-09-08T08:48:13.608289394Z","cvss":null,"epss":{"score":0.00124,"percentile":0.02442,"asOf":"2026-09-15"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Bitnami","name":"minio","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/minio/minio/security/advisories/GHSA-3rh2-v3gr-35p9"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34204"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-08T08:48:13.608289394Z"}}