CVE-2026-25197 Gardyn Cloud API Authorization Bypass Through User-Controlled Key

Critical 9.3 Published 3 Apr 2026 Updated 7 Apr 2026

Authenticated users can access other user profiles by modifying the ID parameter in API calls, leading to unauthorized data access.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-25197?

CVE-2026-25197 is a critical authentication bypass vulnerability in Gardyn Cloud API, published on 3 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A specific endpoint allows authenticated users to pivot to other user profiles by modifying the id number in the API call.

Weakness: CWE-639

Which versions are affected by CVE-2026-25197?

It affects 1 product.

Products include Mygardyn Cloud Api.

How do I fix CVE-2026-25197?

No fix has been published for CVE-2026-25197 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-25197 being exploited?

There is no known exploitation of CVE-2026-25197 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Sources

Also known as GHSA-m6m3-75j4-96wf.