{"id":"CVE-2025-31489","aliases":["BIT-minio-2025-31489","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":"MinIO is a High Performance Object Storage released under GNU Affero General Public License v3.0. 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\nto - 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. This issue is fixed in RELEASE.2025-04-03T14-56-28Z.","published":"2025-04-03T19:36:09.335Z","modified":"2026-08-12T03:51:39.999471617Z","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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:39.999471617Z"}}