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GHSA-wg47-6jq2-q2hh

MinIO performs incomplete signature validation for unsigned-trailer uploads

Source: GitHub Advisory Database (reviewed) High CVE-2025-31489

Packages

EcosystemPackageAffectedFixed in
Go github.com/minio/minio < 0.0.0-20250403145552-8c70975283f9 0.0.0-20250403145552-8c70975283f9

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact This is a high priority vulnerability and users must upgrade ASAP. The signature component of the authorization may be invalid, which would mean that as a client you can use any arbitrary secret to upload objects given the user already has prior WRITE permissions on the bucket, Prior knowledge of access-key, and bucket name this user might have access to - and an access-key with a WRITE permissions is necessary. However with relevant information in place, uploading random objects to buckets is trivial and easy via `curl` ### Patches Yes https://github.com/minio/minio/pull/21103 ### Workarounds Reject requests with `x-amz-content-sha256: STREAMING-UNSIGNED-PAYLOAD-TRAILER` for now at LB layer, ask application users to use `STREAMING-AWS4-HMAC-SHA256-PAYLOAD-TRAILER`

References

External links from the advisory. They lead to third-party sites.