CVE-2026-86081n8n: Regular Expression Denial of Service in the Default Blocked-File-Pattern Match via a Git Node Clone Path
Updated under an hour ago ()
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It affects n8n-io n8n. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.1 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-1333
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Undergoing Analysis
- Record last updated
- Sep 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
n8n-io n8n n8n_io:n8n (from the name) | from 2.38.0, < 2.38.2; from 2.0.0, < 2.37.7; before 1.123.76 | CNA record |
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-j535-v25q-vx3qx-refsource-confirm
- https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76x-refsource-misc
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7x-refsource-misc
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.