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CVE-2026-122267

Unsigned x‑amz‑* Headers Enable Cross‑Bucket Read via Presigned PUT URL in MinIO

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.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Chainguard
Products
Minio