CVE-2026-34204

MinIO is Vulnerable to SSE Metadata Injection via Replication Headers

State: Published
Severity: 7.1 High
Published: Mar 31, 2026
Updated: Apr 1, 2026
Reserved: Mar 26, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	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	GitHub_M

Weaknesses

CWE-287 Improper Authentication

Affected Products

Product	Versions
miniominio	< RELEASE.2026-03-26T21-24-40ZAffected

References

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

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.