baptisteArno typebot.io up to 3.17.1 HTTP Interface server-side request forgery

Summaryinfo

A vulnerability labeled as critical has been found in baptisteArno typebot.io up to 3.17.1. This affects an unknown function of the component HTTP Interface. Such manipulation leads to server-side request forgery. This vulnerability is documented as CVE-2026-48764. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in baptisteArno typebot.io up to 3.17.1. Affected by this issue is an unknown part of the component HTTP Interface. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-48764 since 05/22/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 3.17.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch f56c3c3f771df13a8c11e88f500dfdd78981bed1 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• baptisteArno

Name

• typebot.io

Version

• 3.17.0
• 3.17.1

License

• open-source

Website

• Product: https://github.com/baptisteArno/typebot.io/

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