CVE-2026-34204 | BDVDB-2026-323940 Detail

miniominio

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.

Impact#

Per CVSS v4.0: confidentiality impact none, integrity impact low, availability impact high. Attack vector: network.

Weaknesses#

CWE-287 Improper Authentication

References#

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

Exploit#

No public exploit known

History#

Version 12026-03-31Record published in the CVE List.
Version 22026-04-01Most recent update recorded in the CVE List.

Published

Published: 2026-03-31
Last modified: 2026-04-01

Vendor information

Vendor: minio
Product: minio

All minio vulnerabilities

Score

7.1 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 2.5.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Authentication Issues

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< RELEASE.2026-03-26T21-24-40Z
Fixed
Not stated

Scoring System

CVSS v4.0

7.1 High

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	None
Privileges Required	Low
User Interaction	None
Vulnerable System Confidentiality	None
Vulnerable System Integrity	Low
Vulnerable System Availability	High
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).