{"id":"GHSA-wg47-6jq2-q2hh","summary":"MinIO performs incomplete signature validation for unsigned-trailer uploads","details":"### Impact\nThis is a high priority vulnerability and users must upgrade ASAP.\n\nThe 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,\n\nPrior knowledge of access-key, and bucket name this user might have access to - and an access-key with a WRITE permissions is necessary.\n\nHowever with relevant information in place, uploading random objects to buckets is trivial and easy via `curl`\n\n### Patches\nYes https://github.com/minio/minio/pull/21103\n\n### Workarounds\nReject 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`","aliases":["BIT-minio-2025-31489","CVE-2025-31489","GO-2025-3594"],"modified":"2026-08-07T08:12:20.762137338Z","published":"2025-04-04T14:28:29Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2025-04-04T14:28:29Z","nvd_published_at":"2025-04-03T20:15:25Z","cwe_ids":["CWE-347"],"severity":"HIGH"},"references":[{"type":"WEB","url":"https://github.com/minio/minio/security/advisories/GHSA-wg47-6jq2-q2hh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-31489"},{"type":"WEB","url":"https://github.com/minio/minio/pull/21103"},{"type":"WEB","url":"https://github.com/minio/minio/commit/8c70975283f9f4ce80f331a25c7475a36279e519"},{"type":"PACKAGE","url":"https://github.com/minio/minio"}],"affected":[{"package":{"name":"github.com/minio/minio","ecosystem":"Go","purl":"pkg:golang/github.com/minio/minio"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.0-20250403145552-8c70975283f9"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/04/GHSA-wg47-6jq2-q2hh/GHSA-wg47-6jq2-q2hh.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}