CVE-2023-28434

HighCVSS 8.8/10Known exploited (CISA KEV)Last modified Jun 17, 2026

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`.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-269

Affected software

Vendor	Product	Versions
minio	minio	< RELEASE.2023-03-20T20-16-18Z

References

https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5Patch
https://github.com/minio/minio/pull/16849Exploit, Issue Tracking
https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8cVendor Advisory
https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5Patch
https://github.com/minio/minio/pull/16849Exploit, Issue Tracking
https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8cVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28434US Government Resource

Timeline

Published: Mar 22, 2023
Last modified: Jun 17, 2026
Added to CISA KEV: Sep 19, 2023
NVD status: Analyzed

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