CVE-2026-109375: Vercel deepsec before 1.1.17 Arbitrary File Write via Symlink in Sandbox Tarball Extraction
Medium · CVSS 6.1 (CVSS 3.1)EPSS 0.32%, 25th percentilePublished Updated Assigner: VulnCheck
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.
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N · CWE-59
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
Vercel: deepsec
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/vercel-labs/deepsec (opens in new tab)
- github.com/vercel-labs/deepsec/commit/c5a4e4220ece72aee67c2ea21f4340e65f673fc1 (opens in new tab)
- github.com/vercel-labs/deepsec/pull/46 (opens in new tab)
- github.com/vercel-labs/deepsec/pull/47 (opens in new tab)
- www.vulncheck.com/advisories/vercel-deepsec-before-1.1.17-arbitrary-file-write-via-syml… (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)