CVE-2025-62506: Minio Iam Session Policy Bypass

Policy arguments inherited from another request may retain `DenyOnly = true`. When verifying restricted session policies, this causes only explicit denials to be checked, bypassing explicit allow requirements and leading to privilege escalation. Ensure `DenyOnly = false` is enforced when checking a session policy.

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Description

Policy arguments inherited from another request may retain `DenyOnly = true`. When verifying restricted session policies, this causes only explicit denials to be checked, bypassing explicit allow requirements and leading to privilege escalation. Ensure `DenyOnly = false` is enforced when checking a session policy.