CVE-2026-86080
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
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| n8n-io | n8n | >= 2.38.0, < 2.38.2 | affected |
| n8n-io | n8n | >= 2.0.0, < 2.37.7 | affected |
| n8n-io | n8n | < 1.123.76 | affected |
Weaknesses
- CWE-347: CWE-347: Improper Verification of Cryptographic Signature
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-5m98-cgcr-xx3q
- https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2
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