CVE-2026-122267

high

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.

References

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

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-117823

Details

Source: Mitre, NVD

Published: 2026-11-05

Updated: 2026-11-05

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity: High

CVSS v4

Base 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