{"schema":"threatline.record/2","record":{"id":"CVE-2026-109375","aliases":[],"summary":"Vercel deepsec before 1.1.17 Arbitrary File Write via Symlink in Sandbox Tarball Extraction","details":"Vercel deepsec from 0.1.0 before 1.1.17 contains a link following vulnerability in extractTarballLocally that allows sandboxed code to write files outside the sandbox by planting links in result tarballs. Attackers controlling sandbox code, such as a prompt-injected coding agent, can plant symbolic or hard links in the host data directory to write arbitrary files on the orchestrator host.","categories":["Unclassified"],"product":"deepsec","vendor":"Vercel","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109375","source_modified_at":"2026-10-13T15:45:01.735Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"deepsec","vendor":"Vercel","versions":[{"version":"0.1.0","status":"affected","versionType":"semver","lessThan":"1.1.17"},{"version":"1.1.17","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109375","source_modified_at":"2026-10-13T15:45:01.735Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"deepsec","ecosystem":null},"version":"1.1.17","basis":"first unaffected version stated in the CVE record"}],"cvss":4.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00322,"percentile":0.24055,"score_date":"2026-10-23"},"published_at":"2026-10-12T20:55:08.596Z","modified_at":"2026-10-13T15:45:01.735Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-109375","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-13T15:45:01.735Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-109375","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/vercel-labs/deepsec/pull/46","tags":["issue-tracking","patch"]},{"source":"CVE List","url":"https://github.com/vercel-labs/deepsec/pull/47","tags":["patch","issue-tracking"]},{"source":"CVE List","url":"https://github.com/vercel-labs/deepsec/commit/c5a4e4220ece72aee67c2ea21f4340e65f673fc1","tags":["patch"]},{"source":"CVE List","url":"https://github.com/vercel-labs/deepsec","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/vercel-deepsec-before-1.1.17-arbitrary-file-write-via-symlink-in-sandbox-tarball-extraction","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-13T15:44:46.422330Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-13T15:45:01.735Z","content_hash":"d76fd9e1c8bebf1001c49f8c0acb3af0a6b5f5a6d0cb89a36852f30f30b980ff"}}