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  4. CVE 2026 86081 n8n regular expression denial of service in the
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Back to active CVEs
High · CVSS 0.0CVE-2026-86081GHSA-J535-V25Q-VX3Q

n8n: Regular Expression Denial of Service in the Default Blocked-File-Pattern Match via a Git Node Clone PathCVE-2026-86081

Answer in brief

CVE-2026-86081 records a High severity (CVSS 0.0) vulnerability in n8n: Regular Expression Denial of Service in the Default Blocked-File-Pattern Match via a Git Node Clone Path. The current sources do not mark it as known exploited. The current feed maps n8n-io/n8n (generic), n8n (npm), n8n (npm), n8n (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 8, 2026Updated Sep 10, 2026Source checked Oct 25, 2026First seen by HOL Sep 8, 2026Material review Sep 10, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-1333
Source
CVE List V5
Source checked
Oct 25, 2026
References
7 linked sources
Open source record

Key facts

Risk
High · CVSS 0.0
Exploitation
Not marked as known exploited
Affected software
7 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 0.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps n8n-io/n8n (generic), n8n (npm), n8n (npm), n8n (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
n8n-io/n8ngeneric>= 2.38.0, < 2.38.2 || >= 2.0.0, < 2.37.7 || < 1.123.76Not reported
n8nnpm>=2.38.0 <2.38.22.38.2
n8nnpm>=2.0.0 <2.37.72.37.7
n8nnpm<1.123.761.123.76
n8nnpm>=2.38.0,<2.38.22.38.2
n8nnpm>=2.0.0,<2.37.72.37.7
n8nnpm>=0 <1.123.761.123.76

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for n8n-io/n8n, n8n, n8n.
  2. 2Review the reported fix. Update n8n to 2.38.2; n8n to 2.37.7; n8n to 1.123.76; n8n to 2.38.2; n8n to 2.37.7; n8n to 1.123.76 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 8, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • NVD vulnerability recordnvd.nist.gov
  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.