CVE DATABASE / CVE-2023-28434
CVE-2023-28434
MinIO Security Feature Bypass Vulnerability
Confirmed exploited in the wild. Added 2023-09-19.
Federal remediation due 2023-10-10.
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Summary
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`.
CVSS 3.1 breakdown
| Base score | 8.8 (HIGH) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Attack vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity | HIGH |
| Availability | HIGH |
Weakness type (CWE)
Affected products
Use our free CVE Lookup tool for the latest NVD record, or browse the full CISA KEV catalog.
References
- https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5
- https://github.com/minio/minio/pull/16849
- https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28434
Data: NIST NVD + CISA KEV. NVD last modified 2026-02-26. Always verify against the vendor advisory before acting.