Vulnerability · Published Jul 8, 2026 · Assigned by VulnCheck

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

Medium 6.4

In plain English

A medium-severity incorrect authorization in n8n from n8n. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)0.3%top 77.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	n8n	2.26.2	GHSA-h3jj-5f3v-3685
npm	n8n	2.25.7	GHSA-h3jj-5f3v-3685

Affected products (as reported)

Vendor	Product	Versions
n8n	n8n	2.26.0 – before 2.26.2
n8n	n8n	0 – before 2.25.7

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References

GitHub Security Advisory (GHSA-h3jj-5f3v-3685) vendor-advisory
VulnCheck Advisory: n8n - Authorization Bypass in Public API Execution Retry Endpoint third-party-advisory