CVE-2026-77082
Last modified
CVE-2026-77082 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| N8n | N8n | < 1.123.69 |
| N8n | N8n | >= 2.0.0, < 2.33.4 |
| N8n | N8n | 2.34.0 |
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-q3fv-295f-qfpfMitigation, Vendor Advisory
- https://www.vulncheck.com/advisories/n8n-before-redos-via-filter-and-switch-nodeThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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