Vulnerability DatabaseCVE-2026-122267
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CVE-2026-122267
Published:November 05, 2026
Updated:November 09, 2026
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.
Related Resources (3)
https://nvd.nist.gov/vuln/detail/CVE-2026-122267
https://github.com/chainguard-forks/minio/security/advisories/GHSA-48rv-pgqh-mhjg
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122267.json
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CVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Verification of Cryptographic Signature
CWE-347
EPSS
Base Score:
0.20