CVE-2026-34204: high-severity vulnerability in minio
MinIO is Vulnerable to SSE Metadata Injection via Replication Headers
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.1%
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.
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
Affected products
minio · minioRelated CVEs — minio
In the same product, most dangerous first.
CVE-2023-28432HIGHMinio Information Disclosure in Cluster DeploymentEPSS 84.0%KEVCVE-2023-28434HIGHMinIO is vulnerable to privilege escalation on Linux/MacOSEPSS 7.9%KEVCVE-2022-35919HIGHAuthenticated requests for server update admin API allows path traversal in minioEPSS 52.1%CVE-2021-43858HIGHUser privilege escalation in MinIOEPSS 35.5%CVE-2024-24747HIGHMinIO unsafe default: Access keys inherit `admin` of root user, allowing privilege escalationEPSS 34.1%CVE-2021-21287HIGHServer-Side Request Forgery in MinIO Browser APIEPSS 23.9%