What’s Vulnerable › Vulnerabilities
CVE-2026-33419: MinIO: LDAP login brute-force via user enumeration and missing rate limit
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-24 · updated 2026-06-17
- Weakness: CWE-204
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.
Affected products
- minio: before 2026-03-17t21-25-16z — fixed in 2026-03-17t21-25-16z
How to fix
Upgrade to a fixed version: minio 2026-03-17t21-25-16z. Check the vendor advisory for mitigations.
References
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