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TI-2026-26499 Aliases CVE-2026-34204GHSA-3rh2-v3gr-35p9

MinIO is Vulnerable to SSE Metadata Injection via Replication Headers

Priority LOW 36CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00129 2nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MinIOminio< RELEASE.2026-03-26T21-24-40Z—No fix listedCNA
—github.com/minio/minio (Go)0.0.0-20240328174456-468a9fae83e9 – 0.0.0-20260212201848-7aac2a2c5b7c—No fix listedGHSA-3rh2-v3gr-35p9
  • minio VendorMinIO Affected < RELEASE.2026-03-26T21-24-40Z Fixed in — No fix listed CNA
  • github.com/minio/minio (Go) Vendor— Affected 0.0.0-20240328174456-468a9fae83e9 – 0.0.0-20260212201848-7aac2a2c5b7c Fixed in — No fix listed GHSA-3rh2-v3gr-35p9

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:*before 2026-03-26t21-24-40zVulnerableMinIO
  • cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:* Versions before 2026-03-26t21-24-40z Vulnerable ·MinIO

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34204
  2. 2026-10-03 Alias added: GHSA-3rh2-v3gr-35p9

References

Advisory 2

Other 2

  • TI-2023-12978 MinIO is vulnerable to privilege escalation on Linux/MacOS KEVCVSS 3.1HIGH 8.8
  • TI-2023-12976 Minio Information Disclosure in Cluster Deployment KEVCVSS 3.1HIGH 7.5
  • TI-2023-11082 Allowed DELETE on resources on object locked buckets under Governance mode in Minio CVSS 3.1HIGH 8.8
  • TI-2024-16264 MinIO unsafe default: Access keys inherit `admin` of root user, allowing privilege escalation CVSS 3.1HIGH 8.8
  • TI-2022-08654 Improper Privilege Management in MinIO CVSS 3.1HIGH 8.8
  • TI-2022-13073 Possible DDOS by establishing keep-alive connections with anonymous HTTP clients in MinIO CVSS 3.1HIGH 7.5
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences