CVE-2026-122267 - Vulnerability Details - OpenCVE

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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

No data.

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OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://github.com/chainguard-forks/minio/security/advisories/GHSA-48rv-pgqh-mhjg

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		https://github.com/chainguard-forks/minio/security/advisories/GHSA-48rv-pgqh-mhjg
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'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: chainguard

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

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

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

Link: CVE-2026-122267

Vulnrichment

No data.

NVD

Status : Received

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

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

Link: CVE-2026-122267

Redhat

No data.

OpenCVE Enrichment

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

Weaknesses

CWE-347

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