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Respond faster and outpace attackers. Taking command of your attack surface starts here.
Explore platform
Capabilities
Attack Surface Management
Reveal & protect coverage gaps
Exposure Management
Identify & remediate at-risk data
Vulnerability Management
Pinpoint & eliminate risk
CyberGRC
Manage governance, risk & compliance
Next-Gen SIEM
Investigate with AI-driven detections
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Recognize & mitigate adversaries
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Discover & defend sensitive data
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Scan & simplify dev workflows
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Preemptive MDR that disrupts attackers
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Maximize and protect your Microsoft investment
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Rapid7 MDR vs. Competitors
Decide which solution fits
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Get help pinpointing exposures
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Get help with defense assessment
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Metasploit
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Endpoint monitoring, digital forensic and cyber response platform
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Transform raw threat data into curated, high-fidelity intelligence
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BACK TO VEDB

CVE-2026-122267: Chainguard MinIO: MinIO Signature V4 verification before RELEASE.2026-09-22T19-25-18Z accepts unsigned x-amz-* headers, letting a…

Name: CVE-2026-122267: Chainguard MinIO: MinIO Signature V4 verification before RELEASE.2026-09-22T19-25-18Z accepts unsigned x-amz-* headers, letting a…
Creator: Rapid7
Published: 2026-11-05T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-122267, CWE-347, CVSS 8.8

REQUEST DEMO

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 Details

CVSS 4.0 Base Score: 8.8 (HIGH)
CVSS 4.0 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)

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CVE details

CVSS v4 Score

8.8 High

CVSS v3 ScoreN/A

EPSS ScoreN/A

EPSS PercentileN/A

In CISA KEV CatalogueFalse

Published

Nov 5, 2026

References

NVD ↗
MITRE ↗

MDR Buyer's Guide

Global Threat Landscape Report

MDR Buyer's Guide

Global Threat Landscape Report

CVE-2026-122267: Chainguard MinIO: MinIO Signature V4 verification before RELEASE.2026-09-22T19-25-18Z accepts unsigned x-amz-* headers, letting a…

CVSS Details

Prioritize with Active Threat Intelligence