GHSA-wg47-6jq2-q2hh — minio
Fix: minio/minio#21103GHSA-wg47-6jq2-q2hh is a CWE-347 vulnerability in github.com/minio/minio. A fix is available for github.com/minio/minio — see the affected versions and patch details below.
MinIO performs incomplete signature validation for unsigned-trailer uploads
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-wg47-6jq2-q2hh.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Real-World Exposure
github.com/minio/minioReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
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
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/minio/minio | all versions | 0.0.0-20250403145552-8c70975283f9go get github.com/minio/minio@v0.0.0-20250403145552-8c70975283f9 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/minio/minio, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/minio/minio to 0.0.0-20250403145552-8c70975283f9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-wg47-6jq2-q2hh is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-wg47-6jq2-q2hh can be triaged on real exposure rather than presence alone.
Tailored to GHSA-wg47-6jq2-q2hh. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
How to detect GHSA-wg47-6jq2-q2hh
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id ghsa-wg47-6jq2-q2hh -u https://target- Template
- MinIO - Incomplete Signature Validation for Unsigned-Trailer Uploads
- Severity
- high
- Impact
- Attackers with knowledge of valid access keys can upload arbitrary objects to MinIO buckets using invalid signatures, potentially compromising data integrity and availability.
- Remediation
- This issue is fixed in RELEASE.2025-04-03T14-56-28Z.
Template by ProjectDiscovery nuclei-templates (iamnoooob, rootxharsh, pdresearch), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is GHSA-wg47-6jq2-q2hh in your dependencies?
O3 Security finds GHSA-wg47-6jq2-q2hh across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.