{"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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "MinIO", "vendor": "Chainguard", "versions": [{"lessThanOrEqual": "RELEASE.2026-09-21T00-15-41Z", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "82cea9a6-e9e3-46fe-bdb0-3673de380178"}], "cveTags": [], "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."}], "id": "CVE-2026-122267", "lastModified": "2026-11-05T22:17:55.117", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "82cea9a6-e9e3-46fe-bdb0-3673de380178", "type": "Secondary"}]}, "published": "2026-11-05T22:17:55.117", "references": [{"source": "82cea9a6-e9e3-46fe-bdb0-3673de380178", "url": "https://github.com/chainguard-forks/minio/security/advisories/GHSA-48rv-pgqh-mhjg"}], "sourceIdentifier": "82cea9a6-e9e3-46fe-bdb0-3673de380178", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-347"}], "source": "82cea9a6-e9e3-46fe-bdb0-3673de380178", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,RELEASE.2026-09-21T00-15-41Z]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "minio", "vendor": "chainguard"}], "created": "2026-11-05T23:30:16.308046+00:00", "title": "Unsigned x\u2011amz\u2011* Headers Enable Cross\u2011Bucket Read via Presigned PUT URL in MinIO", "updated": "2026-11-06T16:34:47.561581+00:00", "vendors": ["chainguard", "chainguard$PRODUCT$minio"]}