🛡️ CVE-2026-56778 — n8n

🟡 CVSS 6.4 — Medium ✅ No Known Exploit CWE-863 OSV
6.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

n8n: Public API Execution Retry Authorization Bypass

Impact

The Public API endpoint for retrying executions authorized access using workflow:read rather than workflow:execute. An authenticated user with read-only access to a shared workflow could use the Public API to retry executions of that workflow, bypassing the intended permission boundary between read and execute access.

This issue affects instances where workflows are shared with other users or across projects.

Patches

The issue has been fixed in n8n versions 2.25.7, and 2.26.2. Users should upgrade to one of these versions or later to remediate the vulnerability.

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations:

  • Restrict workflow sharing to fully trusted users only.
  • Restrict network access to the n8n Public API to trusted users only.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. Rated impact: confidentiality low, integrity low, availability none.

Weakness class

CVE-2026-56778 is classified as CWE-863: Incorrect Authorization. An authorisation check runs but reaches the wrong conclusion, permitting actions it should refuse.

Affected software

CVE-2026-56778 is recorded against 1 package.

  • n8n

Timeline and source

Published on 16 June 2026 and last revised on 9 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
github.com (Package)

Details

Severity MEDIUM
CVSS Score 6.4
CVSS 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
CWE CWE-863
Public Exploit ✅ No
Source OSV
Published 2026-06-16
Updated 2026-08-12
Modified 2026-07-09
Fix URL N/A

Affected Packages

Software From version Fixed in
n8n — —

Similar Threats

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