# CVE-2026-39966: Missing authorization in typebot.io

> Authenticated users can read private bot definitions from other workspaces due to a broken authorization check in the API.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A: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:** 22 May 2026
- **Updated:** 22 May 2026
- **Also known as:** GHSA-3fr5-999r-84qj

## What is CVE-2026-39966?

CVE-2026-39966 is a medium-severity missing authorization vulnerability in baptisteArno typebot.io, published on 22 May 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 versions 3.15.2, the getLinkedTypebots API endpoint returns full bot definitions to any authenticated user who references a target bot ID in a Typebot Link block, regardless of workspace ownership, leading to IDOR. The authorization check uses Array.filter() with an async callback — since filter() is synchronous, the callback always returns a truthy Promise, so the access control predicate is never actually evaluated. Any authenticated Typebot user can read the full definition of any other workspace's private bots, including: all conversation blocks and logic flow, variable values embedded in the bot (credentials, API keys, PII), webhook URLs and integration configurations. This issue has been fixed in version 3.16.0.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-39966?


## How do I fix CVE-2026-39966?

No fix has been published for CVE-2026-39966 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-39966 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39966 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-39966 and fix it if it is affected.

What it is: CVE-2026-39966 is a medium-severity missing authorization vulnerability in baptisteArno typebot.io, published on 22 May 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-2026-39966 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-2026-39966/ (Markdown: https://insights.sbomify.com/CVE-2026-39966/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-39966
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-39966
- OSV: https://osv.dev/vulnerability/CVE-2026-39966

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-39966/
Summaries are generated and may contain mistakes; the official description above is the record.