CVE-2026-118646

n8n before 1.123.85, 2.43.5, and 2.44.1 ReDoS via Read/Write Files Node

State: Published
Severity: 7.1 High
Published: Oct 28, 2026
Updated: Oct 28, 2026
Reserved: Oct 28, 2026

Description

n8n before 1.123.85, 2.43.5, and 2.44.1 contains a regular expression denial of service vulnerability that allows authenticated members to block the event loop via crafted glob patterns. Attackers who can create and run workflows can submit a wildcard-heavy File(s) Selector pattern causing exponential backtracking, making the UI, API, webhooks, and health checks unresponsive until restart.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	VulnCheck

Weaknesses

CWE-1333 Inefficient Regular Expression Complexity

Affected Products

Product	Versions
n8nn8n-io	before 1.123.85Affected 1.123.85Not affected
n8nn8n-io	2.44.0 to before 2.44.1Affected 2.44.1Not affected
n8nn8n-io	2.0.0 to before 2.43.5Affected 2.43.5Not affected

References

GitHub Security Advisory (GHSA-m7gv-mpg5-7c9v)vendor-advisory
VulnCheck Advisory: n8n before 1.123.85, 2.43.5, and 2.44.1 ReDoS via Read/Write Files Nodethird-party-advisory

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