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.
Published: 2026-11-05
Score: 8.8 High
EPSS: n/a
KEV: No
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Remediation

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Advisories

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History

Thu, 05 Nov 2026 23:45:00 +0000

Type Values Removed Values Added
Title Unsigned x‑amz‑* Headers Enable Cross‑Bucket Read via Presigned PUT URL in MinIO

Thu, 05 Nov 2026 22:15:00 +0000

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

{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: chainguard

Published:

Updated: 2026-11-05T22:00:11.719Z

Reserved: 2026-11-04T21:51:50.367Z

Link: CVE-2026-122267

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-05T22:17:55.117

Modified: 2026-11-05T22:17:55.117

Link: CVE-2026-122267

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-05T23:30:16Z

Weaknesses