CVE-2026-34204 — MinIO is Vulnerable to SSE Metadata Injection via Replication Headers

CVE-2026-34204

MinIO is Vulnerable to SSE Metadata Injection via Replication Headers PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
minio / minio	affected < RELEASE.2026-03-26T21-24-40Z

CWE

CWE-287

References

https://github.com/minio/minio/security/advisories/GHSA-3rh2-v3gr-35p9

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.