---
id: CVE-2026-109375
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
summary: >-
  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 co…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N'
cwe:
  - CWE-59
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T21:17:10.293'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109375'
references:
  - url: 'https://github.com/vercel-labs/deepsec'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/vercel-labs/deepsec/commit/c5a4e4220ece72aee67c2ea21f4340e65f673fc1
    label: disclosure@vulncheck.com
  - url: 'https://github.com/vercel-labs/deepsec/pull/46'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/vercel-labs/deepsec/pull/47'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/vercel-deepsec-before-1.1.17-arbitrary-file-write-via-symlink-in-sandbox-tarball-extraction
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T22:05:40.354Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.