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CVE-2026-118646— n8n before 1.123.85, 2.43.5, and 2.44.1 ReDoS via Read/Write Files Node

Quick assessment

Affected

n8n-io n8n

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

n8n 在版本 1.123.85、2.43.5 和 2.44.1 之前存在正则表达式拒绝服务（ReDoS）漏洞。该漏洞允许已认证用户通过构造特定的通配符模式（glob patterns）阻塞事件循环。能够创建并运行工作流的攻击者可提交包含大量通配符的“文件选择器”模式，从而引发指数级回溯，导致用户界面（UI）、API、Webhook 以及健康检查功能无响应，直至系统重启。

CVSS 6.5 · Medium Updated Oct 29, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 6

Vendor	Product	Version Range	Status
n8n-io	n8n	`< 1.123.85`	affected
		`1.123.85`	unaffected
		`2.44.0< 2.44.1`	affected
		`2.44.1`	unaffected
		`2.0.0< 2.43.5`	affected
		`2.43.5`	unaffected

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Vulnerability Information

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Vulnerability Title

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

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

CWE-1333

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE
n8n-io	n8n	0 ~ 1.123.85	-
n8n-io	n8n	2.44.0 ~ 2.44.1	-
n8n-io	n8n	2.0.0 ~ 2.43.5	-

II. Public POCs for CVE-2026-118646

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-118646

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Other References for CVE-2026-118646 (2)

https://github.com/n8n-io/n8n/security/advisories/GHSA-m7gv-mpg5-7c9v vendor-advisory
https://www.vulncheck.com/advisories/n8n-before-1.123.85-2.43.5-and-2.44.1-redos-via-read-write-files-node third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-118646

Same Patch Batch · n8n-io · 2026-10-28 · 15 CVEs total

CVE-2026-118645	8.7 HIGH	n8n before 1.123.85, 2.43.5, and 2.44.1 Filter Injection via Quick Base Node Where Paramet
CVE-2026-118649	8.3 HIGH	n8n before 2.43.5 and 2.44.1 Authorization Bypass via Crafted Workflow ID in Data Tables
CVE-2026-118647	8.2 HIGH	n8n before 1.123.85, 2.43.5, and 2.44.1 SeaTable Trigger API Token Exposure via Execution
CVE-2026-118643	8.2 HIGH	n8n before 1.123.85, 2.43.5, and 2.44.1 Credential Exposure via Node Execution Error Data
CVE-2026-118644	7.7 HIGH	n8n before 2.41.5 and 2.42.2 Credential Theft via Error-Workflow Context Inheritance
CVE-2026-118679	7.5 HIGH	n8n before 1.123.83, 2.41.4, and 2.42.1 Slack Token Exfiltration via Slack Trigger
CVE-2026-118641	7.5 HIGH	n8n before 1.123.85, 2.43.5, and 2.44.1 OData $filter Injection via Outlook and SharePoint
CVE-2026-118648	7.3 HIGH	n8n before 1.123.85, 2.43.5, and 2.44.1 Stored XSS via Webhook Responses Missing Sandbox P
CVE-2026-118675	7.1 HIGH	n8n before 1.123.85, 2.43.5, and 2.44.1 Credential Guard Bypass via Execute Sub-workflow
CVE-2026-118676	7.1 HIGH	n8n before 1.123.85, 2.43.5, and 2.44.1 Credential Permission Check Bypass
CVE-2026-118642	7.1 HIGH	n8n before 1.123.85, 2.43.5, and 2.44.1 Credential Permission Check Bypass via Inline Sub-
CVE-2026-118678	7.1 HIGH	n8n before 2.41.4 and 2.42.1 Prototype Pollution DoS via Workflow History Compaction
CVE-2026-118677	5.9 MEDIUM	n8n before 2.41.4 and 2.42.1 Local Gateway Deep-Link Silent Re-pairing to Attacker Instanc
CVE-2026-118640	5.4 MEDIUM	n8n before 1.123.85, 2.43.5, and 2.44.1 Chat Hub Authorization Bypass

IV. Related Vulnerabilities

Same product: n8n

Same vendor: n8n-io

Same weakness: CWE-1333