{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-15788", "assignerOrgId": "686469e6-3ff6-451b-ab8b-cf5b9e89401e", "state": "PUBLISHED", "assignerShortName": "Docker", "dateReserved": "2026-07-14T19:25:38.521Z", "datePublished": "2026-07-20T19:12:56.386Z", "dateUpdated": "2026-07-21T12:40:56.055Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "platforms": ["Windows"], "product": "BuildKit", "vendor": "moby", "versions": [{"version": "0", "status": "affected", "lessThan": "0.31.2", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Junyi Liu (mosskappa)"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "BuildKit's cache mount <code>source=</code> selector on Windows Container on Windows (WCOW) workers does not detect NTFS directory junctions placed inside the cache root. A build authored by an untrusted user on a WCOW-configured BuildKit daemon can read arbitrary host files reachable to the BuildKit daemon process."}], "value": "BuildKit's cache mount source= selector on Windows Container on Windows (WCOW) workers does not detect NTFS directory junctions placed inside the cache root. A build authored by an untrusted user on a WCOW-configured BuildKit daemon can read arbitrary host files reachable to the BuildKit daemon process."}], "impacts": [{"capecId": "CAPEC-132", "descriptions": [{"lang": "en", "value": "CAPEC-132 Symlink Attack"}]}], "metrics": [{"cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "baseScore": 5.6, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-59", "description": "CWE-59: Improper Link Resolution Before File Access ('Link Following')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "686469e6-3ff6-451b-ab8b-cf5b9e89401e", "shortName": "Docker", "dateUpdated": "2026-07-20T19:12:56.386Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://github.com/moby/buildkit/security/advisories/GHSA-388v-wmr2-g2v2"}], "source": {"discovery": "EXTERNAL"}, "title": "WCOW cache mount source selector resolves NTFS junctions outside of cache root", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Use trusted build sources."}], "value": "Use trusted build sources."}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-21T12:40:15.680950Z", "id": "CVE-2026-15788", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-21T12:40:56.055Z"}}]}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.31.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "BuildKit", "source": "cna", "vendor": "moby"}, "product": "buildkit", "vendor": "moby"}], "created": "2026-07-20T22:15:03.307040+00:00", "updated": "2026-07-20T22:15:03.307058+00:00", "vendors": ["moby", "moby$PRODUCT$buildkit"]}