CVE-2026-86081
n8n: Regular Expression Denial of Service in the Default Blocked-File-Pattern Match via a Git Node Clone Path
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1333 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Sep 8, 2026 |
| Last Updated | Sep 9, 2026 |
Stay Ahead of the Next One
Get instant alerts for n8n-io n8n
Be the first to know when new unknown vulnerabilities affecting n8n-io n8n are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
n8n-io / n8n
>= 2.38.0, < 2.38.2 >= 2.0.0, < 2.37.7 < 1.123.76
References
github.com: https://github.com/n8n-io/n8n/security/advisories/GHSA-j535-v25q-vx3q github.com: https://github.com/n8n-io/n8n/releases/tag/[email protected] github.com: https://github.com/n8n-io/n8n/releases/tag/[email protected] github.com: https://github.com/n8n-io/n8n/releases/tag/[email protected]