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CVE-2026-77082

n8n before 1.123.69 ReDoS via Filter and Switch Node

Published: Aug 20, 2026Updated: Sep 1, 2026 Sources: CVE List NVDCWE-1333
4.3MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 80.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-1333

Affected Products

n8n-io
commercial·DEaka n8n
n8nOn-premWeb App
Cloud & SaaS / container-orchestration
n8n
oss-project
n8nSaaSWeb App
Cloud & SaaS / saas-application

Exploitability

Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-q3fv-295f-qfpf
github.com
https://www.vulncheck.com/advisories/n8n-before-redos-via-filter-and-switch-node
vulncheck.com

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