Unsigned x‑amz‑* Headers Enable Cross‑Bucket Read via Presigned PUT URL in MinIO
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Chainguard | MinIO | unaffected |
|
No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chainguard | Minio |
|
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.199% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Chainguard
Chainguard minio |
|
| Vendors & Products |
Chainguard
Chainguard minio |
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Unsigned x‑amz‑* Headers Enable Cross‑Bucket Read via Presigned PUT URL in MinIO |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | MinIO Signature V4 verification before RELEASE.2026-09-22T19-25-18Z accepts unsigned x-amz-* headers, letting a presigned PUT URL be escalated into a cross-bucket read. | |
| Weaknesses | CWE-347 | |
| References |
| |
| Metrics |
cvssV4_0
|