High (8.8) in MinIO MinIO. In CISA KEV since 2023-09-19. EPSS 7.9% chance of exploitation in the next 30 days. Fixed in github.com/minio/minio 0.0.0-202303200415.
Minio is a Multi-Cloud Object Storage framework. Prior to RELEASE.2023-03-20T20-16-18Z, an attacker can use crafted requests to bypass metadata bucket name checking and put an object into any bucket while processing `PostPolicyBucket`. To carry out this attack, the attacker requires credentials with `arn:aws:s3:::*` permission, as well as enabled Console API access. This issue has been patched in RELEASE.2023-03-20T20-16-18Z. As a workaround, enable browser API access and turn off `MINIO_BROWSER=off`.
Severity
CVSS 3.1
8.8 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
7.9% chance of exploitation in the next 30 days; higher than 94% of CVEs (scores of 2026-10-31)