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CVE-2026-122267 – MinIO Signature V4 Authentication Bypass Vulnerability

Posted on November 6, 2026
CVE ID :CVE-2026-122267

Published : Nov. 5, 2026, 10:17 p.m. | 51 minutes ago

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.

Severity: 8.8 | HIGH

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