CVE-2026-56237 Capgo - Unauthenticated API Key Generation via Client-Side Parameter Manipulation
Attackers can generate arbitrary API keys by manipulating client-side parameters, bypassing authentication to access protected endpoints.
- 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-2026-56237?
CVE-2026-56237 is a critical authentication bypass vulnerability in Capgo, published on 24 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Capgo before 12.128.2 contains a broken authentication vulnerability in its API key generation mechanism. API keys are exposed in frontend requests, and the backend fails to validate that keys are securely generated and bound to the authenticated user. An attacker can tamper with the API key parameter in the generation request and supply arbitrary values, generating custom API keys without proper authorization, which can lead to unauthorized access to protected endpoints.
Weakness: CWE-287
Which versions are affected by CVE-2026-56237?
How do I fix CVE-2026-56237?
No fix has been published for CVE-2026-56237 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-2026-56237 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56237 exists.
Sources
Also known as GHSA-22w2-mx2h-4fr7.