{"id":"CVE-2026-122267","aliases":["EUVD-2026-117823","GHSA-48rv-pgqh-mhjg"],"status":"published","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.","severity":{"version":"4.0","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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00199,"percentile":0.09792,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-347"],"published":"2026-11-05T22:00:11Z","modified":"2026-11-06T10:46:46Z","products":[{"vendor":"chainguard","product":"minio"},{"vendor":"minio","product":"minio"}],"references":[{"url":"https://github.com/chainguard-forks/minio/security/advisories/GHSA-48rv-pgqh-mhjg","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122267.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-122267","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-122267","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.","status":"published","published":"2026-11-05T22:00:11.719Z","modified":"2026-11-10T14:02:14.947Z","cvss":[{"version":"4.0","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","level":"high","assessor":"cna"}],"cwes":["CWE-347"],"updated_at":"2026-11-10T15:39:10.800702Z"}],"euvd":[{"id":"EUVD-2026-117823","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.","status":"published","published":"2026-11-05T22:00:11Z","modified":"2026-11-10T14:02:14Z","cvss":[{"version":"4.0","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","level":"high"}],"updated_at":"2026-11-10T15:21:21.031993Z"}],"nvd":[{"id":"CVE-2026-122267","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.","status":"published","published":"2026-11-05T22:17:55.117Z","modified":"2026-11-12T20:04:52.377Z","cvss":[{"version":"4.0","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/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","level":"high","assessor":"secondary"}],"cwes":["CWE-347"],"updated_at":"2026-11-10T16:19:50.369963Z"}],"osv":[{"id":"CVE-2026-122267","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.","status":"published","published":"2026-11-05T22:00:11.719Z","modified":"2026-11-12T02:30:31.622950625Z","cvss":[{"version":"4.0","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","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-07T03:08:01.726202Z"}]}}