CVE-2026-41145

MinIO contains an authentication bypass in the STREAMING-UNSIGNED-PAYLOAD-TRAILER code path, affecting releases prior to RELEASE.2026-04-11T03-20-12Z. An attacker with a valid access key (including default minioadmin or any key with WRITE on a bucket) can write objects to any bucket without a val...

MinIO has an Unauthenticated Object Write via Query-String Credential Signature Bypass in Unsigned-Trailer Uploads

Impact What kind of vulnerability is it? Who is impacted? An authentication bypass vulnerability in MinIO's STREAMING-UNSIGNED-PAYLOAD-TRAILER code path allows any user who knows a valid access key to write arbitrary objects to any bucket without knowing the secret key or providing a valid...

GHSA-9C4Q-HQ6P-C237 MinIO has an Unauthenticated Object Write via Missing Signature Verification in Unsigned-Trailer Uploads

Impact Two authentication bypass vulnerabilities in MinIO's STREAMING-UNSIGNED-PAYLOAD-TRAILER code path allow any user who knows a valid access key to write arbitrary objects to any bucket without knowing the secret key or providing a valid cryptographic signature. Any MinIO deployment is...