CVE-2026-86076High· 8.8▾ Twilightn8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the expression compiler sanitizer resolved through dynamically scoped this and did not reject reserved class member names. A class field named __s…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 9.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.3%
Last analysed / modified upstream
0.3% → 0.4%
8.8 → 8.7
8.7 → 8.8
8.8 → 8.7
8.7 → 8.8
8.8 → 8.7
8.7 → 8.8
8.8 → 8.7
8.7 → 8.8
8.8 → 8.7
8.7 → 8.8
8.8 → 8.7
8.7 → 8.8
n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the expression compiler sanitizer resolved through dynamically scoped this and did not reject reserved class member names. A class field named __sanitize could rebind the sanitizer and reach the Function constructor, enabling backend code execution and editor-preview JavaScript execution. The affected AST hook is PrototypeSanitizer in packages/workflow/src/expression-sandboxing.ts. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.
n8n < 1.123.76n8n >= 2.0.0, < 2.37.7n8n >= 2.38.0, < 2.38.2Upgrade past the affected range:
n8n 2.38.2Affected packages:
n8n < 1.123.76n8n >= 2.38.0, < 2.38.2n8n >= 2.0.0, < 2.37.7Patched in:
n8n 1.123.76n8n 2.38.2n8n 2.37.7Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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