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Incorrect Authorization Affecting minio package, versions <0.20251015.172955-r0

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.01% (3rd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-MINIO-13671301
  • published23 Oct 2025
  • disclosed16 Oct 2025
Report a new vulnerability Found a mistake?

Introduced: 16 Oct 2025

CVE-2025-62506  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Chainguard minio to version 0.20251015.172955-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream minio package and not the minio package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

MinIO is a high-performance object storage system. In all versions prior to RELEASE.2025-10-15T17-29-55Z, a privilege escalation vulnerability allows service accounts and STS (Security Token Service) accounts with restricted session policies to bypass their inline policy restrictions when performing operations on their own account, specifically when creating new service accounts for the same user. The vulnerability exists in the IAM policy validation logic where the code incorrectly relied on the DenyOnly argument when validating session policies for restricted accounts. When a session policy is present, the system should validate that the action is allowed by the session policy, not just that it is not denied. An attacker with valid credentials for a restricted service or STS account can create a new service account for itself without policy restrictions, resulting in a new service account with full parent privileges instead of being restricted by the inline policy. This allows the attacker to access buckets and objects beyond their intended restrictions and modify, delete, or create objects outside their authorized scope. The vulnerability is fixed in version RELEASE.2025-10-15T17-29-55Z.