CVE-2026-33419 | THREATINT

Description

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.

PUBLISHED Reserved 2026-03-19 | Published 2026-03-24 | Updated 2026-03-25 | Assigner GitHub_M

CRITICAL: 9.1CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-204: Observable Response Discrepancy

CWE-307: Improper Restriction of Excessive Authentication Attempts

Product status

< RELEASE.2026-03-17T21-25-16Z

affected

References

github.com/.../minio/security/advisories/GHSA-jv87-32hw-hh99

cve.org (CVE-2026-33419)

nvd.nist.gov (CVE-2026-33419)

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