CVE-2026-48764— TypeBot has SSRF in HTTP request and script fetch flows via DNS rebinding bypass

TypeBot has SSRF in HTTP request and script fetch flows via DNS rebinding bypass

TypeBot is a chatbot builder tool. In versions prior to 3.17.2, SSRF validation is implemented by resolving a hostname once and checking whether the resolved IP belongs to a forbidden range allowing for DNS rebinding bypass. The root cause is a time-of-check to time-of-use gap in the SSRF guard. The validator resolves the hostname and approves it, but the later request path performs a fresh resolution and connects to whatever IP the hostname maps to at that moment. The actual outbound request is then performed later using the original hostname, without pinning the validated IP to the network connection. An attacker who can supply a URL to a public bot that performs a server-side HTTP Request block or server-side script fetch can use DNS rebinding to pass the initial validation and still force the server to connect to a private or metadata address during the real request. This enables server-side access to private network services, cloud metadata endpoints, and other internal HTTP targets that the validator was intended to block. The exact downstream impact depends on the reachable internal services. Concrete consequences include metadata disclosure, access to internal admin panels, credential theft from metadata services, and further compromise through internal-only HTTP interfaces. This issue has been fixed in version 3.17.2.

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

服务端请求伪造(SSRF)

baptisteArno typebot.io 服务端请求伪造漏洞

baptisteArno typebot.io是baptisteArno的开源在线表单构建工具。 baptisteArno typebot.io 3.17.2之前版本存在服务端请求伪造漏洞，该漏洞源于SSRF验证存在检查时间与使用时间差距，允许DNS重绑定绕过，攻击者可通过提供URL利用DNS重绑定强制服务器连接到私有或元数据地址，导致服务器端访问私有网络服务、云元数据端点及其他内部HTTP目标，具体影响包括元数据泄露、访问内部管理面板、凭证窃取等。

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