{"id":"CVE-2025-31489","aliases":["GHSA-wg47-6jq2-q2hh","GO-2025-3594"],"url":"https://o3.security/vulnerability/CVE-2025-31489","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`","published":"2025-04-03T19:36:09.335Z","modified":"2026-10-28T02:30:55.752689718Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/minio/minio","fixedVersion":"0.0.0-20250403145552-8c70975283f9"}],"fix":{"url":"https://github.com/minio/minio/pull/21103","label":"minio/minio#21103"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/31xxx/CVE-2025-31489.json"},{"type":"ADVISORY","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":"FIX","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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:55.752689718Z"}}