CVE-2026-47704 baptisteArno CVE debrief

Who should care

Defenders responsible for TypeBot installations, particularly those with authenticated user access, should assess exposure and prioritize upgrading to version 3.17.0 or later. They should also monitor for suspicious webhook activity and implement compensating controls to limit potential impact.

Why it matters

CVE-2026-47704 is a high-severity vulnerability in TypeBot that allows authenticated users to inject arbitrary webhook JSON into other typebots, potentially advancing their execution. Defenders should prioritize verifying exposure, upgrading to version 3.17.0 or later, monitoring for suspicious activity, and implementing compensating controls.

• Potential injection of arbitrary webhook JSON into other typebots
• Possible advancement of victim typebot execution without access
• Need for verification of TypeBot installations and user access
• Priority for upgrading to patched version 3.17.0

Technical summary

CVE-2026-47704 is a high-severity vulnerability in TypeBot, a chatbot builder tool. An authenticated user with read access to any typebot can resume a waiting webhook session belonging to a different typebot, allowing them to inject arbitrary webhook JSON and advance the execution of the victim typebot without access to it. The issue arises from the webhook resume handler authorizing the parent typebot first but then resolving the descendant result only by resultId. This allows an attacker to inject arbitrary webhook JSON into another typebot's suspended session and advance its execution.

Defensive priority

Defenders should prioritize verifying exposure of TypeBot installations to authenticated users and upgrading to version 3.17.0 or later. They should also monitor for suspicious webhook activity and implement compensating controls to limit the impact of potential exploitation.

Recommended defensive actions

• Verify TypeBot installations for exposure to authenticated users
• Upgrade to TypeBot version 3.17.0 or later
• Monitor for suspicious webhook activity
• Implement compensating controls to limit potential impact
• Review asset inventory for TypeBot deployments
• Check for rollback/change windows for patching
• Track source changes for TypeBot updates

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and patched version. However, the corpus does not establish specific exploitation instances or victims.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.