CVE-2026-4171 CodeGenieApp serverless-express API Endpoint TodoList.ts authorization
Attackers can bypass authorization in the TodoList API endpoint to access or modify other users' data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4171?
CVE-2026-4171 is a medium-severity missing authorization vulnerability in CodeGenieApp serverless-express, published on 15 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security vulnerability has been detected in CodeGenieApp serverless-express up to 4.17.1. Affected by this issue is some unknown functionality of the file examples/lambda-function-url/packages/api/models/TodoList.ts of the component API Endpoint. The manipulation of the argument userId leads to authorization bypass. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-4171?
How do I fix CVE-2026-4171?
No fix has been published for CVE-2026-4171 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-4171 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4171 exists.
Sources
Also known as GHSA-3wjp-87jx-r4pv.