CVE-2026-33419
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.
How to fix
- minio minio2026-03-17t21-25-16z or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| minio minio | v < 2026-03-17t21-25-16z | 2026-03-17t21-25-16z |
| github.com/minio/minioGo | v ≤ 0.0.0-20260212201848-7aac2a2c5b7c, No range specified | — |
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Attack Surface Management
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