CVE-2026-86080CWE-347

CVE-2026-86080

Medium · published September 9, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
16.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
6.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00259 · 16.6th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2026-09-09T02:19Z
Affected products (3)
ProductVersionsFixed in
n8n/n8n< 1.123.761.123.76
n8n/n8n≥ 2.0.0, < 2.37.72.37.7
n8n/n8n≥ 2.38.0, < 2.38.22.38.2
References (4)
https://github.com/n8n-io/n8n/releases/tag/[email protected] · [email protected]https://github.com/n8n-io/n8n/releases/tag/[email protected] · [email protected]https://github.com/n8n-io/n8n/releases/tag/[email protected] · [email protected]https://github.com/n8n-io/n8n/security/advisories/GHSA-5m98-cgcr-xx3q · [email protected]
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 0%
    epss
  • 08 SEP 21:25Z
    n8n: GitHub Trigger 422 Reuse Path Skips Webhook Secret Storage, Causing Signature Verification to Fail-Open
    cvelistv5