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  4. CVE 2025 31489 minio performs incomplete signature validation
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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2025-31489GHSA-WG47-6JQ2-Q2HH

MinIO performs incomplete signature validation for unsigned-trailer uploads in github.com/minio/minioCVE-2025-31489

Answer in brief

CVE-2025-31489 records a Unknown severity vulnerability in MinIO performs incomplete signature validation for unsigned-trailer uploads in github.com/minio/minio. The current sources do not mark it as known exploited. The current feed maps github.com/minio/minio (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Apr 4, 2025Updated Oct 8, 2026Source checked Oct 8, 2026First seen by HOL Oct 8, 2026Material review Oct 8, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps github.com/minio/minio (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
github.com/minio/miniogo>=0 <0.0.0-20250403145552-8c70975283f90.0.0-20250403145552-8c70975283f9

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for github.com/minio/minio.
  2. 2Review the reported fix. Update github.com/minio/minio to 0.0.0-20250403145552-8c70975283f9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Apr 4, 2025

    Evidence: source:osv:source_dates:source-dates:record

  2. Source modified

    Oct 8, 2026

    Evidence: source:osv:source_dates:source-dates:record

  3. First seen by HOL

    Oct 8, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • NVD vulnerability recordnvd.nist.gov
Upstream source description

### Impact This is a high priority vulnerability and users must upgrade ASAP. The signature component of the authorization may be invalid, which would mean that as a client you can use any arbitrary secret to upload objects given the user already has prior WRITE permissions on the bucket, Prior knowledge of access-key, and bucket name this user might have access to - and an access-key with a WRITE permissions is necessary. However with relevant information in place, uploading random objects to buckets is trivial and easy via `curl` ### Patches Yes https://github.com/minio/minio/pull/21103 ### Workarounds Reject requests with `x-amz-content-sha256: STREAMING-UNSIGNED-PAYLOAD-TRAILER` for now at LB layer, ask application users to use `STREAMING-AWS4-HMAC-SHA256-PAYLOAD-TRAILER`

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
Not reported
Source
OSV
Source checked
Oct 8, 2026
References
5 linked sources
Open source record