Affects widely-used MinIO; unauthenticated LDAP brute-force to obtain STS credentials and bucket access, impacting many orgs.
CVE-2026-33419
LDAP brute-force enables STS credentials and bucket access.
Is CVE-2026-33419 being exploited?
Not confirmed. CVE-2026-33419 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.44% probability of exploitation in the next 30 days.
How severe is CVE-2026-33419?
CVE-2026-33419 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-33419?
Yes. A fix has been recorded for CVE-2026-33419. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-33419 affect?
CVE-2026-33419 affects MinIO AIStor STS endpoint (AssumeRoleWithLDAPIdentity). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33419?
Upgrade to patched release; verify LDAP protections.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker enumerates LDAP users and brute-forces to obtain temporary STS credentials, gaining bucket access.
Patch when possible