CVE-2026-86080
mediumn8n is an open source workflow automation platform.
Vendor / product: N8n — n8n
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.
CVSS
5.3
5.3 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-09-08 22:19
Modified: 2026-09-11 18:21
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 06:52 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
n8n / n8n <1.123.76, ≥2.0.0 <2.37.7, ≥2.38.0 <2.38.2
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/n8n-io/n8n/security/advisories/GHSA-5m98-cgcr-xx3q
References
- https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76 security-advisories@github.com
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7 security-advisories@github.com
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2 security-advisories@github.com
- https://github.com/n8n-io/n8n/security/advisories/GHSA-5m98-cgcr-xx3q security-advisories@github.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:52 UTC · record ↗