VULNERABILITY INTELLIGENCE

CVE-2026-77082

CVSS score4.3 MEDIUM
EPSS probability0.47%
CISA KEVNot currently listed
Published2026-08-20
Last modified2026-09-01
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Description

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-1333

Primary references