{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-122267","assignerOrgId":"82cea9a6-e9e3-46fe-bdb0-3673de380178","state":"PUBLISHED","assignerShortName":"chainguard","dateReserved":"2026-11-04T21:51:50.367Z","datePublished":"2026-11-05T22:00:11.719Z","dateUpdated":"2026-11-05T22:00:11.719Z"},"containers":{"cna":{"providerMetadata":{"orgId":"82cea9a6-e9e3-46fe-bdb0-3673de380178","shortName":"chainguard","dateUpdated":"2026-11-05T22:00:11.719Z"},"datePublic":"2026-11-05T21:43:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-347","description":"CWE-347 Improper verification of cryptographic signature","type":"CWE"}]}],"impacts":[{"descriptions":[{"lang":"en","value":"Unauthorized cross-bucket data access and modification"}]}],"affected":[{"vendor":"Chainguard","product":"MinIO","versions":[{"status":"affected","version":"0","lessThanOrEqual":"RELEASE.2026-09-21T00-15-41Z","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"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.","supportingMedia":[{"type":"text/html","base64":false,"value":"<h1>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.</h1>"}]}],"references":[{"url":"https://github.com/chainguard-forks/minio/security/advisories/GHSA-48rv-pgqh-mhjg"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.8,"vectorString":"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"}}],"credits":[{"lang":"en","value":"Oren Yomtov of Act Security","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.5"}}}}