CVE-2023-28434
Published 2023-03-22 · Updated 2026-06-17 · Source security-advisories@github.com
Summary
CVE-2023-28434 is a high-severity (CVSS 8.8) vulnerability in MinIO MinIO. CISA added it to the Known Exploited Vulnerabilities catalog on September 19, 2023, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by October 10, 2023. CISA does not currently list it as used in ransomware campaigns. MinIO has 2 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.
All 2 known-exploited MinIO vulnerabilities →Description
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 vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: MinIO — MinIO
Name: MinIO Security Feature Bypass Vulnerability
Date added: 2023-09-19 · Due: 2023-10-10
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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://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