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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 Reserved 2026-03-26 | Published 2026-03-31 | Updated 2026-04-01 | Assigner GitHub_M




HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-287: Improper Authentication

Product status

< RELEASE.2026-03-26T21-24-40Z
affected

References

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

cve.org (CVE-2026-34204)

nvd.nist.gov (CVE-2026-34204)

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