Read the docs
TI-2026-82160 Aliases CVE-2026-118646GHSA-59m3-j5wq-r7rq

Regular expression DoS in n8n Read/Write Files node

Priority LOW 31CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-1333.

Summary

n8n before 1.123.85, from 2.0.0 before 2.43.5, and from 2.44.0 before 2.44.1 are affected. An inefficient regular expression (CWE-1333) lets authenticated members block the event loop with crafted glob patterns. A member who can create and run workflows submits a wildcard-heavy File(s) Selector pattern that causes exponential backtracking, making the UI, API, webhooks, and health checks unresponsive until restart.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

n8n before 1.123.85, 2.43.5, and 2.44.1 contains a regular expression denial of service vulnerability that allows authenticated members to block the event loop via crafted glob patterns. Attackers who can create and run workflows can submit a wildcard-heavy File(s) Selector pattern causing exponential backtracking, making the UI, API, webhooks, and health checks unresponsive until restart.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00249 16th percentileScored 2026-11-07
Fix Fixed n8n (n8n-io): 1.123.85, 2.44.1, 2.43.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
n8nn8nbefore 1.123.851.123.85Patch availableCNA
n8nn8n2.44.0 to before 2.44.12.44.1Patch availableCNA
n8nn8n2.0.0 to before 2.43.52.43.5Patch availableCNA
  • n8n Vendorn8n Affected before 1.123.85 Fixed in 1.123.85 Patch available CNA
  • n8n Vendorn8n Affected 2.44.0 to before 2.44.1 Fixed in 2.44.1 Patch available CNA
  • n8n Vendorn8n Affected 2.0.0 to before 2.43.5 Fixed in 2.43.5 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*——n8n
  • cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:* Versions — — ·n8n

Remediation

Upgrade n8n to 1.123.85 if running a version before 1.123.85, to 2.43.5 if running a version from 2.0.0 before 2.43.5, or to 2.44.1 if running 2.44.0.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA n8n (n8n-io) Fixed in 1.123.85
  • Fix · CNA n8n (n8n-io) Fixed in 2.44.1
  • Fix · CNA n8n (n8n-io) Fixed in 2.43.5

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    n8n-io n8n 2.43.5, 2.44.1

    11 records Highest priority Priority LOW 11 LOW

    Other records, highest priority first

    • TI-2026-82163 Authorization bypass in n8n exposes Data Table rows of all projectsPriority LOW 39
    • TI-2026-82162 Stored cross-site scripting in n8n webhook responsesPriority LOW 38
    • TI-2026-82159 Filter injection in n8n Quick Base node Where parameterPriority LOW 30
    Show all 11 records →
  • Release ·

    n8n-io n8n 1.123.85

    10 records Highest priority Priority LOW 10 LOW

    Other records, highest priority first

    • TI-2026-82162 Stored cross-site scripting in n8n webhook responsesPriority LOW 38
    • TI-2026-82159 Filter injection in n8n Quick Base node Where parameterPriority LOW 30
    • TI-2026-82155 OData filter injection in n8n Outlook and SharePoint nodesPriority LOW 30
    Show all 10 records →

Timeline

  1. 2026-10-28 Threatist record created from CVE-2026-118646
  2. 2026-10-28 Alias added: GHSA-59m3-j5wq-r7rq
  3. 2026-10-30 Priority changed: MEDIUM → LOW
  4. 2026-11-04 CISA SSVC decision points changed

References

Advisory 1

  • TI-2025-42131 n8n Vulnerable to Remote Code Execution via Expression Injection KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-17560 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling CVSS 3.1CRITICAL 10.0
  • TI-2026-01167 Authenticated users can bypass the Expression sandbox mechanism to achieve full remote… CVSS 3.1CRITICAL 9.9
  • TI-2026-00644 Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host. CVSS 3.1CRITICAL 9.9
  • TI-2026-82991 Code execution in n8n via deprecated Function nodes CVSS 4.0HIGH 8.7
  • TI-2025-35293 An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3… CVSS 3.1HIGH 8.8
See all 233 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences