{"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"}}]}}