{"id":"CVE-2026-109375","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.","modified":"2026-10-28T02:30:51.135717598Z","published":"2026-10-12T20:55:08.596Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109375.json","unresolved_ranges":[{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StandardRange","range":[{"introduced":"0.1.0"},{"fixed":"1.1.17"}]}]},{"extracted_events":[{"source":"DESCRIPTION","range":[{"introduced":"0.1.0"},{"fixed":"1.1.17"}]}]}],"cna_assigner":"VulnCheck","cwe_ids":["CWE-59"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109375.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109375"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/vercel-deepsec-before-1.1.17-arbitrary-file-write-via-symlink-in-sandbox-tarball-extraction"},{"type":"FIX","url":"https://github.com/vercel-labs/deepsec/commit/c5a4e4220ece72aee67c2ea21f4340e65f673fc1"},{"type":"FIX","url":"https://github.com/vercel-labs/deepsec/pull/46"},{"type":"FIX","url":"https://github.com/vercel-labs/deepsec/pull/47"},{"type":"PACKAGE","url":"https://github.com/vercel-labs/deepsec"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/vercel-labs/deepsec","events":[{"introduced":"0"},{"fixed":"c5a4e4220ece72aee67c2ea21f4340e65f673fc1"}],"database_specific":{"extracted_events":[{"source":"REFERENCES_COMMIT","range":[{"fixed":"c5a4e4220ece72aee67c2ea21f4340e65f673fc1"}]}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109375.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N"}]}