{"history":[{"alert":0,"cve":"CVE-2026-121520","id":23265,"kind":"epss","observed_at":1794500401,"payload":"{\"date\": \"2026-11-12\", \"epss\": 0.00139, \"percentile\": 0.03302}"},{"alert":0,"cve":"CVE-2026-121520","id":21110,"kind":"epss","observed_at":1794392402,"payload":"{\"date\": \"2026-11-10\", \"epss\": 0.00139, \"percentile\": 0.03278}"},{"alert":1,"cve":"CVE-2026-121520","id":21021,"kind":"cna","observed_at":1794392402,"payload":"{\"containers\": {\"adp\": [{\"metrics\": [{\"other\": {\"content\": {\"id\": \"CVE-2026-121520\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"role\": \"CISA Coordinator\", \"timestamp\": \"2026-11-06T19:30:46.298631Z\", \"version\": \"2.0.3\"}, \"type\": \"ssvc\"}}], \"providerMetadata\": {\"dateUpdated\": \"2026-11-06T19:31:00.151Z\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"affected\": [{\"defaultStatus\": \"unaffected\", \"product\": \"BuildKit\", \"repo\": \"https://github.com/moby/buildkit\", \"vendor\": \"Moby\", \"versions\": [{\"lessThan\": \"0.34.1\", \"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\"}]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"In BuildKit versions prior to v0.34.1, a malicious client with access to the BuildKit control APIs can submit a build request that sets an extended attribute on a file outside the BuildKit state directory. Extended attributes in the trusted. or security. namespaces may also be set, potentially giving a program on the host elevated privileges. This issue affects build services that accept build requests from untrusted users. The issue is fixed in v0.34.1.\"}], \"metrics\": [{\"cvssV4_0\": {\"baseScore\": 4.5, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H\", \"version\": \"4.0\"}, \"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"Host security-label modification\"}]}], \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-61\", \"description\": \"CWE-61: UNIX Symbolic Link (Symlink) Following\", \"lang\": \"en\", \"type\": \"CWE\"}]}], \"providerMetadata\": {\"dateUpdated\": \"2026-11-03T22:11:57.202Z\", \"orgId\": \"686469e6-3ff6-451b-ab8b-cf5b9e89401e\", \"shortName\": \"Docker\"}, \"references\": [{\"tags\": [\"vendor-advisory\"], \"url\": \"https://github.com/moby/buildkit/security/advisories/GHSA-w26x-xg27-7qjc\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Upgrade BuildKit to v0.34.1 or later.\"}], \"source\": {\"discovery\": \"EXTERNAL\"}, \"title\": \"Malicious client could set xattr value outside of BuildKit state directory\", \"workarounds\": [{\"lang\": \"en\", \"value\": \"Restrict access to BuildKit control APIs to trusted clients and do not accept build requests from untrusted users.\"}]}}, \"cveMetadata\": {\"assignerOrgId\": \"686469e6-3ff6-451b-ab8b-cf5b9e89401e\", \"assignerShortName\": \"Docker\", \"cveId\": \"CVE-2026-121520\", \"datePublished\": \"2026-11-03T22:11:57.202Z\", \"dateReserved\": \"2026-11-03T14:26:45.909Z\", \"dateUpdated\": \"2026-11-06T19:31:00.151Z\", \"state\": \"PUBLISHED\"}, \"dataType\": \"CVE_RECORD\", \"dataVersion\": \"5.2\"}"}],"record":{"affected":[{"defaultStatus":"unaffected","product":"BuildKit","repo":"https://github.com/moby/buildkit","vendor":"Moby","versions":[{"lessThan":"0.34.1","status":"affected","version":"0","versionType":"semver"}]}],"cna":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-121520","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-11-06T19:30:46.298631Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-11-06T19:31:00.151Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"BuildKit","repo":"https://github.com/moby/buildkit","vendor":"Moby","versions":[{"lessThan":"0.34.1","status":"affected","version":"0","versionType":"semver"}]}],"descriptions":[{"lang":"en","value":"In BuildKit versions prior to v0.34.1, a malicious client with access to the BuildKit control APIs can submit a build request that sets an extended attribute on a file outside the BuildKit state directory. Extended attributes in the trusted. or security. namespaces may also be set, potentially giving a program on the host elevated privileges. This issue affects build services that accept build requests from untrusted users. The issue is fixed in v0.34.1."}],"metrics":[{"cvssV4_0":{"baseScore":4.5,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H","version":"4.0"},"format":"CVSS","scenarios":[{"lang":"en","value":"Host security-label modification"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-61","description":"CWE-61: UNIX Symbolic Link (Symlink) Following","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-11-03T22:11:57.202Z","orgId":"686469e6-3ff6-451b-ab8b-cf5b9e89401e","shortName":"Docker"},"references":[{"tags":["vendor-advisory"],"url":"https://github.com/moby/buildkit/security/advisories/GHSA-w26x-xg27-7qjc"}],"solutions":[{"lang":"en","value":"Upgrade BuildKit to v0.34.1 or later."}],"source":{"discovery":"EXTERNAL"},"title":"Malicious client could set xattr value outside of BuildKit state directory","workarounds":[{"lang":"en","value":"Restrict access to BuildKit control APIs to trusted clients and do not accept build requests from untrusted users."}]}},"cveMetadata":{"assignerOrgId":"686469e6-3ff6-451b-ab8b-cf5b9e89401e","assignerShortName":"Docker","cveId":"CVE-2026-121520","datePublished":"2026-11-03T22:11:57.202Z","dateReserved":"2026-11-03T14:26:45.909Z","dateUpdated":"2026-11-06T19:31:00.151Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"cna_checked":1794500401,"cve":"CVE-2026-121520","description":"In BuildKit versions prior to v0.34.1, a malicious client with access to the BuildKit control APIs can submit a build request that sets an extended attribute on a file outside the BuildKit state directory. Extended attributes in the trusted. or security. namespaces may also be set, potentially giving a program on the host elevated privileges. This issue affects build services that accept build requests from untrusted users. The issue is fixed in v0.34.1.","epss":{"date":"2026-11-12","epss":0.00139,"percentile":0.03302},"epss_checked":1794522003,"first_seen":1794378631,"kev":null,"kev_checked":1794522003,"products":"Moby BuildKit","references":["https://github.com/moby/buildkit/security/advisories/GHSA-w26x-xg27-7qjc"],"score":{"baseScore":4.5,"baseSeverity":"MEDIUM","provider":"Docker","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H","version":"4.0"},"solutions":"Upgrade BuildKit to v0.34.1 or later.","state":"PUBLISHED","title":"Malicious client could set xattr value outside of BuildKit state directory","updated_at":1794500401,"workarounds":"Restrict access to BuildKit control APIs to trusted clients and do not accept build requests from untrusted users."},"sources":[{"canonical_url":"https://www.bleepingcomputer.com/news/microsoft/microsoft-november-2026-patch-tuesday-fixes-1-235-flaws-outlook-zero-day/","id":375,"publisher":"BleepingComputer","title":"Microsoft November 2026 Patch Tuesday fixes 1,235 flaws, Outlook zero-day"}]}
