CVE-2026-77082
Medium · 4.3CVSS
4.3
EPSS
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Published
Aug 20, 2026
CISA due date
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The record
n8n before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 contains a regular expression denial of service (ReDoS) vulnerability in the Filter and Switch nodes, which compile user-supplied regex patterns with new RegExp() and execute them synchronously on the worker thread without complexity validation or execution timeout. A crafted regex pattern can block the worker for an extended period per data item processed, delaying other workflow executions on the same worker.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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