Vulnerability Intelligence Report
MinIO: JWT Algorithm Confusion in OIDC Authentication
CVE-2026-33322
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.
No Active Exploit Signals
CVSS Base Score
9.2
CRITICAL
EPSS Probability:0.41%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-287 ↗CWE-287: Improper Authentication
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| minio | minio | >= RELEASE.2022-11-08T05-27-07Z, < RELEASE.2026-03-17T21-25-16Z (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.410%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | GitHub, Inc. · Vendor · USA |
| Reserved | 2026-03-18T21:23:36 |
| Published | 2026-03-24T19:05:04 |
| Last Updated | 2026-03-25T14:28:14 |
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