High 8.8Known exploited (CISA KEV)Published Mar 22, 2023

CVE-2023-28434MinIO is vulnerable to privilege escalation on Linux/MacOS

Updated under an hour ago (2026-10-19 06:25 UTC)

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It affects minio. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Sep 19, 2023; federal agencies had to remediate by Oct 10, 2023. Treat that date as your deadline.

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Exploited in the last 30 days

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: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-269
Known exploited: Added to CISA KEV Sep 19, 2023; federal remediation due Oct 10, 2023Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 7.92% (percentile 95)
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

minio minio minio:minio (from the name)	before RELEASE.2023-03-20T20-16-18Z	CNA record
minio minio minio:minio	before 2023-03-20t20-16-18z	NVD

References

https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8cx-refsource-confirm, vendor-advisory
https://github.com/minio/minio/pull/16849x-refsource-misc, exploit, issue-tracking
https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5x-refsource-misc, patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28434us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.