How severe is CVE-2026-33419?

CVE-2026-33419 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-33419 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33419?

CVE-2026-33419 affects Minio. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33419?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-33419 have an EU (EUVD) identifier?

Yes. CVE-2026-33419 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15000.

When was CVE-2026-33419 published?

CVE-2026-33419 was published on 2026-03-24 and last updated on 2026-06-17.

CVE-2026-33419

CVE-2026-33419 is a high-severity vulnerability in Minio with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-204.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 9.1
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-15000
Weakness: CWE-204
Affected product: Minio
Published: 2026-03-24
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-33419?: 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 severe is CVE-2026-33419?: CVE-2026-33419 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-33419 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33419?: CVE-2026-33419 affects Minio. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33419?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-33419 have an EU (EUVD) identifier?: Yes. CVE-2026-33419 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15000.
When was CVE-2026-33419 published?: CVE-2026-33419 was published on 2026-03-24 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:*

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