Summary
Workarounds
If upgrading is not immediately possible, administrators should consider the following temporary mitigations:
- Restrict credential sharing to fully trusted users only.
- Audit shared credentials for unexpected OAuth token changes and revoke any tokens that may have been replaced.
These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
n8n has adopted CVSS 4.0 as primary score for all security advisories. CVSS 3.1 vector strings are provided for backwards compatibility.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Impact
The OAuth1 and OAuth2 credential reconnect endpoints authorized access using credential:read rather than credential:update. An authenticated user with read-only access to a shared credential could initiate an OAuth reconnect flow and overwrite the stored token material for that credential with tokens bound to an external account they control. Workflows relying on the affected credential would subsequently execute under the attacker's OAuth identity, enabling data exfiltration to attacker-controlled external services and persistent takeover of shared integrations.
This issue affects instances where credentials are shared with other users or across projects.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Remediation advice
The issue has been fixed in n8n versions 1.123.43, 2.20.7, and 2.21.1. Users should upgrade to one of these versions or later to remediate the vulnerability.
Frequently Asked Questions
- What is CVE-2026-45732? CVE-2026-45732 is a high-severity security vulnerability in n8n (npm), affecting versions < 1.123.43. It is fixed in 1.123.43, 2.21.1, 2.20.7.
- Which versions of n8n are affected by CVE-2026-45732? n8n (npm) versions < 1.123.43 is affected.
- Is there a fix for CVE-2026-45732? Yes. CVE-2026-45732 is fixed in 1.123.43, 2.21.1, 2.20.7. Upgrade to this version or later.
- Is CVE-2026-45732 exploitable, and should I be worried? Whether CVE-2026-45732 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-45732 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-45732?
- Upgrade
n8nto 1.123.43 or later - Upgrade
n8nto 2.21.1 or later - Upgrade
n8nto 2.20.7 or later
- Upgrade