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CVE-2026-33322

Minio authentication bypass

9.8 CRITICALEPSS 0.61%
  1. Published24 Mar 2026

Description

MinIO is a high-performance object storage system. From RELEASE.2022-11-08T05-27-07Z to before RELEASE.2026-03-17T21-25-16Z, a JWT algorithm confusion vulnerability in MinIO's OpenID Connect authentication allows an attacker who knows the OIDC ClientSecret to forge arbitrary identity tokens and obtain S3 credentials with any policy, including consoleAdmin. This issue has been patched in RELEASE.2026-03-17T21-25-16Z.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Minio≥ 2022-11-08t05-27-07z < 2026-03-17t21-25-16z

Remediation

Fixed in
Minio≥ 2026-03-17t21-25-16z

References

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Frequently asked

Is CVE-2026-33322 being actively exploited?

CVE-2026-33322 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.61%.

How severe is CVE-2026-33322?

CVE-2026-33322 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.61% probability of exploitation.

Which products are affected by CVE-2026-33322?

Affected products include Minio.

How do I fix CVE-2026-33322?

Upgrade affected software to a fixed version, for example Minio 2026-03-17t21-25-16z or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-33322 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.