What’s Vulnerable › Vulnerabilities
CVE-2026-34204: MinIO is Vulnerable to SSE Metadata Injection via Replication Headers
- Severity: high (CVSS 7.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-31 · updated 2026-07-24
- Weakness: CWE-287
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.
Affected products
- minio: before 2026-03-26t21-24-40z — fixed in 2026-03-26t21-24-40z
How to fix
Upgrade to a fixed version: minio 2026-03-26t21-24-40z. Check the vendor advisory for mitigations.
References
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