{"id":"CVE-2023-28434","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-28434","generatedAt":"2026-10-31T11:46:16.433Z","title":"MinIO Security Feature Bypass Vulnerability","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`.","published":"2023-03-22T21:15:18.000Z","lastModified":"2026-06-17T05:47:44.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-269"],"affected":["minio/minio"],"epss":{"score":0.07917,"percentile":0.94716,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2023-09-19","dueDate":"2023-10-10","knownRansomwareCampaignUse":"Unknown","notes":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.\nhttps://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c;  https://nvd.nist.gov/vuln/detail/CVE-2023-28434"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 10 October 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/minio/minio/pull/16849","tags":["Exploit","Issue Tracking"],"source":"security-advisories@github.com"},{"url":"https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c","tags":["Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/minio/minio/pull/16849","tags":["Exploit","Issue Tracking"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28434","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-28434","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}