# CVE-2026-48494: TypeBot vulnerable to cross-typebot WhatsApp preview webhook resume via global `wa-preview-{phone}` session ids

> An authenticated user can inject arbitrary webhook data into another user's WhatsApp preview session, modifying unpublished flows without authorization.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Aug 2026
- **Updated:** 11 Aug 2026
- **Also known as:** GHSA-fqf7-mmp5-j3jq

## What is CVE-2026-48494?

CVE-2026-48494 is a high-severity missing authorization vulnerability in baptisteArno typebot.io, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

TypeBot is a chatbot builder tool. In version 3.16.1, an authenticated user who has read access to any typebot can resume a WhatsApp preview webhook session that belongs to a different typebot by mixing an authorized `typebotId` and `blockId` and a foreign preview phone number tied to another preview session. The WhatsApp test-webhook handler authorizes the parent typebot first, but then resolves the preview chat session only by `wa-preview-{phone}`. As a result, an attacker can inject arbitrary webhook JSON into another workspace's WhatsApp preview session and advance its draft/unpublished flow without any access to the victim typebot. Version 3.17.0 patches the issue.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-48494?


## How do I fix CVE-2026-48494?

No fix has been published for CVE-2026-48494 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-48494 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48494 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-48494 and fix it if it is affected.

What it is: CVE-2026-48494 is a high-severity missing authorization vulnerability in baptisteArno typebot.io, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48494 exists.

Affected product: baptisteArno typebot.io. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-48494/ (Markdown: https://insights.sbomify.com/CVE-2026-48494/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-48494
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-48494
- OSV: https://osv.dev/vulnerability/CVE-2026-48494

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-48494/
Summaries are generated and may contain mistakes; the official description above is the record.