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CVE-2026-118649— n8n before 2.43.5 and 2.44.1 Authorization Bypass via Crafted Workflow ID in Data Tables

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 2.43.5 之前版本，以及 2.44.x 系列中 2.44.1 之前的版本，会接受客户端提供的流程（workflow）ID，并根据该 ID 将每个流程的所属项目缓存到内存中。因此，攻击者可构造特殊的 ID（例如），导致数据表（Data Table）项目检查逻辑错误地匹配所有项目。任何拥有创建和运行流程权限的已认证用户，均可列出、读取、修改和删除该实例中所有项目内的数据表行。

CVSS 8.3 · High Updated Oct 29, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

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

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Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

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Vulnerability Title

n8n before 2.43.5 and 2.44.1 Authorization Bypass via Crafted Workflow ID in Data Tables

Source: CVE Program / CVE List V5

Vulnerability Description

n8n before 2.43.5 and 2.44.x before 2.44.1 accepts a client-supplied workflow ID and caches each workflow's owner project in memory by that ID, so a crafted ID such as __proto__ makes the Data Table project check match every project. An authenticated member who can create and run workflows can list, read, modify, and delete Data Table rows in all projects of the instance.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

CWE-1321

Source: CVE Program / CVE List V5

Affected Products

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

II. Public POCs for CVE-2026-118649

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-118649

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Other References for CVE-2026-118649 (2)

https://github.com/n8n-io/n8n/security/advisories/GHSA-wvjj-qg37-pv73 vendor-advisory
https://www.vulncheck.com/advisories/n8n-before-2.43.5-and-2.44.1-authorization-bypass-via-crafted-workflow-id-in-data-tables third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-118649

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-2026-118647	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-2026-118646	6.5 MEDIUM	n8n before 1.123.85, 2.43.5, and 2.44.1 ReDoS via Read/Write Files Node
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-1321