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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.

漏洞描述： Typebot 是一款开源的聊天机器人构建工具。在 3.18.0 版本之前的自托管（self-hosted）版本中，其服务器端的“发送电子邮件”（Send Email）集成模块存在任意本地文件读取漏洞。 该模块通过 Typebot 变量来构建 Nodemailer 邮件附件。其内部的 辅助函数在处理附件路径时存在缺陷：当输入值不以应用程序自身的基础 URL 开头时，它会将该值直接视为文件系统路径返回，而不是要求必须提供以 或 开头的有效网络 URL。 同时，创建的 Nodemailer 传输对象未启用

CVSS 8.7 · High

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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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

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

V. Comments for CVE-2026-62865

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