{"id":"CVE-2026-109375","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-109375","generatedAt":"2026-10-28T03:39:34.735Z","title":"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.","description":"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.","published":"2026-10-12T21:17:10.000Z","lastModified":"2026-10-16T19:18:45.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":4.9,"severity":"MEDIUM","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-59"],"affected":[],"epss":{"score":0.00322,"percentile":0.25103,"date":"2026-10-27","history":[{"date":"2026-10-13","score":0.00322,"percentile":0.23476}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.32%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-12T21:17:10.000Z","detail":{"score":"4.9","severity":"MEDIUM","publishedAt":"2026-10-12T21:17:10.293Z"},"summary":"New CVE, medium severity (CVSS 4.9)."}],"references":[{"url":"https://github.com/vercel-labs/deepsec","source":"disclosure@vulncheck.com"},{"url":"https://github.com/vercel-labs/deepsec/commit/c5a4e4220ece72aee67c2ea21f4340e65f673fc1","source":"disclosure@vulncheck.com"},{"url":"https://github.com/vercel-labs/deepsec/pull/46","source":"disclosure@vulncheck.com"},{"url":"https://github.com/vercel-labs/deepsec/pull/47","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/vercel-deepsec-before-1.1.17-arbitrary-file-write-via-symlink-in-sandbox-tarball-extraction","source":"disclosure@vulncheck.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-109375","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}