Skip to main content

Mondoo

Vulnerability Management
Technology
Services

Solutions

Financial Services
Manufacturing
Healthcare

Resources

Blog
Vulnerability Database
Documentation
GitHub

Company

About
Careers
Partners
Contact

Legal

Privacy
Terms
Imprint

© 2026 Mondoo, Inc.

Log in Get Assessment

Vulnerability IntelligenceCVE-2026-34204

CVE-2026-34204

HIGH7.1

MinIO is Vulnerable to SSE Metadata Injection via Replication Headers

Published Mar 31, 2026

Modified 1 weeks ago

Details

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.

References

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

https://www.cve.org/CVERecord?id=CVE-2026-34204

CVSS Analysis

CVSS v4.0

7.1

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Attack Requirements

NoneAT:N

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Vulnerable System

Vuln. Confidentiality

NoneVC:N

Vuln. Integrity

LowVI:L

Vuln. Availability

HighVA:H

Subsequent System

Subseq. Confidentiality

NoneSC:N

Subseq. Integrity

NoneSI:N

Subseq. Availability

NoneSA:N

7.1/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

Weakness Type (CWE)

Authentication

Improper Authentication

Ecosystems

Timeline

PublishedMar 31, 2026

ModifiedApr 1, 2026

CVE-2026-34204 | Mondoo Vulnerability Intelligence