CVE-2026-33419: critical vulnerability in minio
MinIO: LDAP login brute-force via user enumeration and missing rate limit
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 0.5%
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.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
minio · minioRelated CVEs — minio
In the same product, most dangerous first.
CVE-2023-28432HIGHMinio Information Disclosure in Cluster DeploymentEPSS 84.0%KEVCVE-2023-28434HIGHMinIO is vulnerable to privilege escalation on Linux/MacOSEPSS 7.9%KEVCVE-2022-35919HIGHAuthenticated requests for server update admin API allows path traversal in minioEPSS 52.1%CVE-2021-43858HIGHUser privilege escalation in MinIOEPSS 35.5%CVE-2024-24747HIGHMinIO unsafe default: Access keys inherit `admin` of root user, allowing privilege escalationEPSS 34.1%CVE-2021-21287HIGHServer-Side Request Forgery in MinIO Browser APIEPSS 23.9%