CVE-2026-86080 n8n: GitHub Trigger 422 Reuse Path Skips Webhook Secret Storage, Causing Signature Verification to Fail-Open
Attackers can bypass GitHub webhook signature verification in n8n by exploiting a 422 error path that skips secret storage, allowing unauthorized workflow triggers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-86080?
CVE-2026-86080 is a medium-severity vulnerability in N8n N8n, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the GitHub Trigger generated a webhook secret but discarded it when GitHub returned HTTP 422 and the node reused an existing webhook. Workflow static data then retained webhookId without webhookSecret, and X-Hub-Signature-256 verification accepted deliveries without a stored secret. The affected logic includes packages/nodes-base/nodes/Github/GithubTriggerHelpers.ts and the 422 webhook reuse path. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.
Weakness: CWE-347
Which versions are affected by CVE-2026-86080?
6 open source packages ship an affected version, including n8n. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
n8n npm | All versions | 1.123.76 |
n8n npm | All versions | 1.123.76 |
n8n npm | From 2.0.0 | 2.37.7 |
n8n npm | From 2.0.0 | 2.37.7 |
n8n npm | From 2.38.0 | 2.38.2 |
n8n npm | From 2.38.0 | 2.38.2 |
Products include N8n N8n.
How do I fix CVE-2026-86080?
Upgrade n8n to a fixed version for your release line: 1.123.76, 2.37.7 or 2.38.2.
Is CVE-2026-86080 being exploited?
There is no known exploitation of CVE-2026-86080 in the wild and no public exploit code.
Other vulnerabilities in N8n N8n
- CVE-2025-68613 n8n Improper Control of Dynamically-Managed Code Resources
- CVE-2026-21877 n8n is vulnerable to Remote Code Execution via Arbitrary File Write
- CVE-2026-21858 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
- CVE-2026-1470 n8n Unsafe Workflow Expression Evaluation Allows Remote Code Execution
- CVE-2025-68668 n8n Vulnerable to Arbitrary Command Execution in Pyodide based Python Code Node
Sources
Also known as GHSA-5m98-cgcr-xx3q, MINI-gvpj-grxc-j7c9.