CVE-2023-28432 — MinIO Information Disclosure Vulnerability

Minio is a Multi-Cloud Object Storage framework. In a cluster deployment starting with RELEASE.2019-12-17T23-16-33Z and prior to RELEASE.2023-03-20T20-16-18Z, MinIO returns all environment variables, including `MINIO_SECRET_KEY` and `MINIO_ROOT_PASSWORD`, resulting in information

01What is this vulnerability?

Minio is a Multi-Cloud Object Storage framework. In a cluster deployment starting with RELEASE.2019-12-17T23-16-33Z and prior to RELEASE.2023-03-20T20-16-18Z, MinIO returns all environment variables, including `MINIO_SECRET_KEY` and `MINIO_ROOT_PASSWORD`, resulting in information disclosure. All users of distributed deployment are impacted. All users are advised to upgrade to…

02Affected products

Vendor	Product	Versions
minio	minio	>= RELEASE.2019-12-17T23-16-33Z, < RELEASE.2023-03-20T20-16-18Z

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2023-04-21. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-03-22T20:16:38.641Z
• Last modified: 2025-10-21T23:15:22.503Z
• Added to CISA KEV: 2023-04-21
• BOD 22-01 due: 2023-05-12

09References

• github.com — https://github.com/minio/minio/security/advisories/GHSA-6xvq-wj2x-3h3q
• github.com — https://github.com/minio/minio/releases/tag/RELEASE.2023-03-20T20-16-18Z
• twitter.com — https://twitter.com/Andrew___Morris/status/1639325397241278464
• viz.greynoise.io — https://viz.greynoise.io/tag/minio-information-disclosure-attempt
• www.greynoise.io — https://www.greynoise.io/blog/openai-minio-and-why-you-should-always-use-docker-…