EUVD-2026-74275
GHSA-j535-v25q-vx3q
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-accessible editor interface, low complexity ReDoS trigger, but PR:L required; pure availability impact with no confidentiality or integrity effect.
Primary rating from Vendor (github).
CVSS VectorVendor: github
Lifecycle Timeline
5DescriptionCVE.org
n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the Git node clone operation matched an attacker-controlled destination path against the default N8N_BLOCK_FILE_PATTERNS regular expression. The pattern ^(./).git(/.)$ allowed catastrophic backtracking and ran synchronously in the main n8n process. An authenticated workflow editor could therefore freeze the instance with one workflow execution; the affected default is declared in packages/@n8n/config/src/configs/security.config.ts. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.
AnalysisAI
ReDoS (regular expression denial of service) in n8n's Git node clone operation allows an authenticated workflow editor to freeze the entire n8n instance with a single workflow execution. The vulnerability stems from catastrophic backtracking in the default N8N_BLOCK_FILE_PATTERNS regex (^(./).git(/.)$), which runs synchronously in the main process against an attacker-controlled destination path. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated n8n workflow editor account - unauthenticated access is insufficient. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VA:H, score 7.1) accurately reflects the realistic attack profile: network-reachable, low complexity, but gated behind PR:L - meaning the attacker must hold an authenticated workflow-editor account. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade n8n to version 1.123.76 (v1 branch), 2.37.7 (v2.37 branch), or 2.38.2 (v2.38 branch). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify and catalog all n8n deployments and their current versions. …
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Same technique Denial Of Service
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External POC / Exploit Code
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