CVE-2026-77082n8n before 1.123.69 ReDoS via Filter and Switch Node
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 5.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-1333
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Aug 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
n8n-io n8n n8n_io:n8n (from the name) | before 1.123.69; 1.123.69 not affected | CNA record |
n8n n8n n8n:n8n | before 1.123.69; from 2.0.0 before 2.33.4; 2.34.0 | NVD |
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-q3fv-295f-qfpfvendor-advisory, mitigation
- https://www.vulncheck.com/advisories/n8n-before-redos-via-filter-and-switch-nodethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.