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CVE-2026-62865— TypeBot: Arbitrary server file read via Send Email block attachment path

Quick assessment

Affected
baptisteArno typebot.io
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.

Typebot是Typebot公司开源的一款集成人工智能的智能客服对话系统。 Typebot 3.18.0之前版本存在安全漏洞，该漏洞源于服务器端Send Email集成板块在构建Nodemailer附件时，将不包含应用自身基础URL的附件值作为文件系统路径处理，且未禁用文件访问功能，导致任意注册用户可通过发送邮件附件方式读取服务器本地任意文件（如/etc/passwd、/proc/self/environ及进程环境中的敏感信息），造成信息泄露。

CVSS 8.7 · High EPSS 0.32% · P25

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 1

VendorProduct Version RangeStatus
baptisteArno typebot.io < 3.18.0 affected
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I. Basic Information for CVE-2026-62865

Vulnerability Information
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Vulnerability Title
TypeBot: Arbitrary server file read via Send Email block attachment path
Source: CVE Program / CVE List V5
Vulnerability Description
Typebot is an open-source chatbot builder. In self-hosted versions prior to 3.18.0, the server-side Send Email integration block allows arbitrary reading of local files on the server. The block builds Nodemailer attachments from a typebot variable, and its parseAttachments helper returns the supplied value as a filesystem path whenever it does not start with the application's own base URL, instead of requiring an http or https URL. The Nodemailer transport is created without disableFileAccess or disableUrlAccess, both of which default to false, so an attachment specified as an absolute server path is read from the local filesystem and delivered. Because both the attachment value and the recipient list are attacker-controllable typebot variables, any registered user can publish a bot whose Send Email block attaches an absolute path such as /etc/passwd or /proc/self/environ and mails it to an address they control. This enables reading any file the server process can access, including process environment secrets such as the credential encryption key and database connection string, without administrative privileges or victim interaction. Open signup is enabled by default and the system SMTP credential is already configured, so no non-default configuration is required. This issue is fixed in version 3.18.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Typebot 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Typebot是Typebot公司开源的一款集成人工智能的智能客服对话系统。 Typebot 3.18.0之前版本存在安全漏洞，该漏洞源于服务器端Send Email集成板块在构建Nodemailer附件时，将不包含应用自身基础URL的附件值作为文件系统路径处理，且未禁用文件访问功能，导致任意注册用户可通过发送邮件附件方式读取服务器本地任意文件（如/etc/passwd、/proc/self/environ及进程环境中的敏感信息），造成信息泄露。
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
baptisteArno typebot.io < 3.18.0 -

II. Public POCs for CVE-2026-62865

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III. Intelligence Information for CVE-2026-62865

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Patches & Fixes for CVE-2026-62865 (1)

Vendor Advisories for CVE-2026-62865 (1)

Vendor Pages for CVE-2026-62865 (1)

Same Patch Batch · baptisteArno · 2026-08-25 · 3 CVEs total

CVE-2026-62862 9.1 CRITICAL TypeBot: Account takeover via brute-forceable 6-digit magic-link code
CVE-2026-62861 6.4 MEDIUM TypeBot: Cross-tenant custom-domain removal via unbound `name` in handleDeleteCustomDomain

IV. Related Vulnerabilities

Same product: typebot.io
Same vendor: baptisteArno
Same weakness: CWE-200