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TI-2026-25733 Aliases CVE-2026-33322GHSA-5cx5-wh4m-82fh

MinIO: JWT Algorithm Confusion in OIDC Authentication

Priority MEDIUM 42CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass, Information disclosure
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-287 and CWE-327.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00425 37th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MinIOminio>= RELEASE.2022-11-08T05-27-07Z, < RELEASE.2026-03-17T21-25-16Z—No fix listedCNA
—github.com/minio/minio (Go)up to 0.0.0-20260212201848-7aac2a2c5b7c—No fix listedGHSA-5cx5-wh4m-82fh
  • minio VendorMinIO Affected >= RELEASE.2022-11-08T05-27-07Z, < RELEASE.2026-03-17T21-25-16Z Fixed in — No fix listed CNA
  • github.com/minio/minio (Go) Vendor— Affected up to 0.0.0-20260212201848-7aac2a2c5b7c Fixed in — No fix listed GHSA-5cx5-wh4m-82fh

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:*2022-11-08t05-27-07z to before 2026-03-17t21-25-16zVulnerableMinIO
  • cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:* Versions 2022-11-08t05-27-07z to before 2026-03-17t21-25-16z Vulnerable ·MinIO

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33322
  2. 2026-10-03 Alias added: GHSA-5cx5-wh4m-82fh

References

Advisory 2

Other 1

  • TI-2023-12978 MinIO is vulnerable to privilege escalation on Linux/MacOS KEVCVSS 3.1HIGH 8.8
  • TI-2023-12976 Minio Information Disclosure in Cluster Deployment KEVCVSS 3.1HIGH 7.5
  • TI-2023-11082 Allowed DELETE on resources on object locked buckets under Governance mode in Minio CVSS 3.1HIGH 8.8
  • TI-2024-16264 MinIO unsafe default: Access keys inherit `admin` of root user, allowing privilege escalation CVSS 3.1HIGH 8.8
  • TI-2022-08654 Improper Privilege Management in MinIO CVSS 3.1HIGH 8.8
  • TI-2022-13073 Possible DDOS by establishing keep-alive connections with anonymous HTTP clients in MinIO CVSS 3.1HIGH 7.5
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences