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TI-2026-25816 Aliases CVE-2026-33419GHSA-jv87-32hw-hh99

MinIO: LDAP login brute-force via user enumeration and missing rate limit

Priority MEDIUM 46CWE-204Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-204 and CWE-307.

Summary

MinIO is a high-performance object storage system. Prior to RELEASE.2026-03-17T21-25-16Z, MinIO AIStor's STS (Security Token Service) AssumeRoleWithLDAPIdentity endpoint is vulnerable to LDAP credential brute-forcing due to two combined weaknesses: (1) distinguishable error responses that enable username enumeration, and (2) absence of rate limiting on authentication attempts. An unauthenticated network attacker can enumerate valid LDAP usernames and then perform unlimited password guessing to obtain temporary AWS-style STS credentials, gaining access to the victim's S3 buckets and objects. This issue has been patched in RELEASE.2026-03-17T21-25-16Z.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00456 39th 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.2026-03-17T21-25-16Z—No fix listedCNA
—github.com/minio/minio (Go)up to 0.0.0-20260212201848-7aac2a2c5b7c—No fix listedGHSA-jv87-32hw-hh99
  • minio VendorMinIO Affected < RELEASE.2026-03-17T21-25-16Z Fixed in — No fix listed CNA
  • github.com/minio/minio (Go) Vendor— Affected up to 0.0.0-20260212201848-7aac2a2c5b7c Fixed in — No fix listed GHSA-jv87-32hw-hh99

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:*before 2026-03-17t21-25-16zVulnerableMinIO
  • cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:* Versions before 2026-03-17t21-25-16z Vulnerable ·MinIO

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33419
  2. 2026-10-03 Alias added: GHSA-jv87-32hw-hh99

References

Patch 1

Advisory 1

Other 1

  • 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