CVE-2026-86080

n8n: GitHub Trigger 422 Reuse Path Skips Webhook Secret Storage, Causing Signature Verification to Fail-Open

MEDIUM

5.3

CVSS Score

Published: September 8, 2026 at 09:25 PM UTC

Updated: September 11, 2026 at 06:40 PM UTC

2 products affected across 2 vendorsN8NN8N

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

N8N · N8Nnpm

95%

v < 1.123.762.0.0 ≤ v < 2.37.72.38.0 ≤ v < 2.38.2

Affected range stops below 1.123.76, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.37.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.38.2, so it looks safe — our inference, not a vendor statement

N8N · N8N Io

60%

v < 1.123.76v < 2.37.7v < 2.38.2

Affected range stops below 1.123.76, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.37.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.38.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://github.com/n8n-io/n8n/security/advisories/GHSA-5m98-cgcr-xx3q

References (4)

x_refsource_CONFIRMMitigationVendor Advisory

Source: cverecord

https://github.com/n8n-io/n8n/security/advisories/GHSA-5m98-cgcr-xx3q

x_refsource_MISCRelease Notes

Source: cverecord

https://github.com/n8n-io/n8n/releases/tag/[email protected]

x_refsource_MISCRelease Notes

Source: cverecord

https://github.com/n8n-io/n8n/releases/tag/[email protected]

x_refsource_MISCRelease Notes

Source: cverecord

https://github.com/n8n-io/n8n/releases/tag/[email protected]

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-347

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