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CVE-2026-86081

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 · EPSS 0.6% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • n8n

    Versions
    • >= 2.38.0, < 2.38.2: Affected
    • >= 2.0.0, < 2.37.7: Affected
    • < 1.123.76: Affected

    No fix published

  • n8n npm

    Affected ranges
    • SEMVER: < 1.123.76

    Update to 1.123.76

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.38.0, < 2.38.2

    Update to 2.38.2

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.0.0, < 2.37.7

    Update to 2.37.7

Original sources

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