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CVE-2026-27496— n8n has In-Process Memory Disclosure in its Task Runner

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是n8n开源的一个可扩展的工作流自动化工具。 n8n 1.123.22之前版本、2.9.3之前版本和2.10.1之前版本存在安全漏洞，该漏洞源于JavaScript Task Runner可分配未初始化内存缓冲区，可能导致敏感进程数据信息泄露。

AI Predicted 7.5 Difficulty: Easy EPSS 0.46% · P37

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-27496

Vulnerability Information
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Vulnerability Title
n8n has In-Process Memory Disclosure in its Task Runner
Source: CVE Program / CVE List V5
Vulnerability Description
n8n is an open source workflow automation platform. Prior to versions 1.123.22, 2.9.3, and 2.10.1, an authenticated user with permission to create or modify workflows could use the JavaScript Task Runner to allocate uninitialized memory buffers. Uninitialized buffers may contain residual data from the same Node.js process — including data from prior requests, tasks, secrets, or tokens — resulting in information disclosure of sensitive in-process data. Task Runners must be enabled using `N8N_RUNNERS_ENABLED=true`. In external runner mode, the impact is limited to data within the external runner process. The issue has been fixed in n8n versions 1.123.22, 2.10.1 , and 2.9.3. Users should upgrade to this version or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Limit workflow creation and editing permissions to fully trusted users only, and/or use external runner mode (`N8N_RUNNERS_MODE=external`) to isolate the runner process. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对未经初始化资源的使用
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n开源的一个可扩展的工作流自动化工具。 n8n 1.123.22之前版本、2.9.3之前版本和2.10.1之前版本存在安全漏洞，该漏洞源于JavaScript Task Runner可分配未初始化内存缓冲区，可能导致敏感进程数据信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
n8n-io n8n < 1.123.22 -

II. Public POCs for CVE-2026-27496

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III. Intelligence Information for CVE-2026-27496

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Vendor Advisories for CVE-2026-27496 (1)

Other References for CVE-2026-27496 (1)

Same Patch Batch · n8n-io · 2026-03-25 · 11 CVEs total

CVE-2026-33660 n8n Has Multiple Remote Code Execution Vulnerabilities in Merge Node AlaSQL SQL Mode
CVE-2026-33663 n8n Vulnerable to Credential Theft via Name-Based Resolution and Permission Checker Bypass
CVE-2026-33665 n8n: LDAP Email-Based Account Linking Allows Privilege Escalation and Account Takeover
CVE-2026-33696 n8n Vulnerable to Prototype Pollution in XML & GSuiteAdmin node parameters lead to RCE
CVE-2026-33713 n8n Vulnerable to SQL Injection in Data Table Node via orderByColumn Expression
CVE-2026-33722 n8n Has External Secrets Authorization Bypass in Credential Saving
CVE-2026-33720 n8n Has Authorization Bypass in OAuth Callback via N8N_SKIP_AUTH_ON_OAUTH_CALLBACK
CVE-2026-33724 n8n's Source Control SSH Configuration Uses StrictHostKeyChecking=no
CVE-2026-33749 n8n Vulnerable to XSS via Binary Data Inline HTML Rendering
CVE-2026-33751 n8n Vulnerable to LDAP Filter Injection in LDAP Node

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-908

V. Comments for CVE-2026-27496

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