CVE-2023-28434
MinIO is vulnerable to privilege escalation on Linux/MacOS
- High 8.8
- Exploited: added to CISA KEV 19 Sep 2023
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`.
Key facts
- Published
- 22 Mar 2023
- Last changed
- 21 Oct 2025
- Assigned by
- GitHub_M
- KEV added
- 19 Sep 2023
- KEV fix due
- 10 Oct 2023
- EPSS
- 7.917% likely to be exploited in the next 30 days, higher than 94.813% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 8.8CVSS 3.1, Highfrom the CNA (GitHub_M)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| minio | minio |
|
Timeline
- 22 Mar 2023 Published
- 19 Sep 2023 CVE-2023-28434 added to CISA KEV
- 19 Sep 2023 Added to the CISA KEV catalogue