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一、 漏洞 CVE-2026-21858 基础信息
漏洞信息
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Vulnerability Title
n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0.
来源: 美国国家漏洞数据库 NVD
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
输入验证不恰当
来源: 美国国家漏洞数据库 NVD
Vulnerability Title
n8n 输入验证错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
n8n是n8n开源的一个可扩展的工作流自动化工具。 n8n 1.121.0之前版本存在输入验证错误漏洞，该漏洞源于攻击者可通过执行基于表单的工作流访问底层服务器文件，可能导致敏感信息泄露。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
厂商产品影响版本CPE订阅
n8n-ion8n >= 1.65.0, < 1.121.0 -
二、漏洞 CVE-2026-21858 的公开POC
#POC 描述源链接神龙链接
1n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-21858.yamlPOC详情
2A maximum severity vulnerability dubbed "Ni8mare" allows remote, unauthenticated attackers to take control over locally deployed instances of the N8N workflow automation platform.https://github.com/eduardorossi84/CVE-2026-21858-POCPOC详情
3n8n Ni8mare - Unauthenticated Arbitrary File Read to RCE Chain (CVSS 10.0)https://github.com/Chocapikk/CVE-2026-21858POC详情
4CVE-2026-21858https://github.com/Ashwesker/Ashwesker-CVE-2026-21858POC详情
5Comprehensive vulnerability detection tool for n8n workflow automation instances. Detects the critical CVE-2026-21858 vulnerability (CVSS 10.0) without performing any exploitation.https://github.com/cropnet/ni8mare-scannerPOC详情
6SASTRA-ADI-WIGUNA-CVE-2026-21858-Holistic-Audithttps://github.com/sastraadiwiguna-purpleeliteteaming/SASTRA-ADI-WIGUNA-CVE-2026-21858-Holistic-AuditPOC详情
7Comprehensive vulnerability detection tool for n8n workflow automation instances. Detects the critical CVE-2026-21858 vulnerability (CVSS 10.0) without performing any exploitation.https://github.com/cropnet/Ni8marePOC详情
8Nonehttps://github.com/sec-dojo-com/CVE-2026-21858POC详情
9Proof of Concept: CVE-2026-21858 is vulnerability on n8n where unauthenticated remote attackers can access sensitive files.https://github.com/SystemVll/CVE-2026-21858POC详情
10CVE-2026-21858https://github.com/bgarz929/Ashwesker-CVE-2026-21858POC详情
11Hackhttps://github.com/Alhakim88/CVE-2026-21858POC详情
12Nonehttps://github.com/EQSTLab/CVE-2026-21858POC详情
13CVE-2026-21858https://github.com/zaryouhashraf/CVE-2026-21858POC详情
14Nonehttps://github.com/bamov970/CVE-2026-21858POC详情
15https://github.com/vulhub/vulhub/blob/master/n8n/CVE-2026-21858/README.mdPOC详情
16Nonehttps://github.com/Threekiii/Awesome-POC/blob/master/Web%E5%BA%94%E7%94%A8%E6%BC%8F%E6%B4%9E/n8n%20Content-Type%20%E6%B7%B7%E6%B7%86%E4%BB%BB%E6%84%8F%E6%96%87%E4%BB%B6%E8%AF%BB%E5%8F%96%E8%87%B3%20RCE%20%E6%BC%8F%E6%B4%9E%20CVE-2026-21858.mdPOC详情
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三、漏洞 CVE-2026-21858 的情报信息
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IV. Related Vulnerabilities
Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-20
V. Comments for CVE-2026-21858

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