CVE-2026-56227 Capgo - Server-Side Request Forgery via Webhook URL Validation
Capgo allows admins to configure webhooks targeting internal addresses, enabling Server-Side Request Forgery and information disclosure.
- 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-2026-56227?
CVE-2026-56227 is a medium-severity server-side request forgery vulnerability in Capgo, published on 20 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Capgo before 12.128.2 contains a server-side request forgery vulnerability in webhook URL validation that allows loopback and internal addresses. Organization admins can configure webhooks pointing to localhost or 127.0.0.1, and when triggered, the backend performs outbound requests to these addresses with error responses disclosed to users.
Weakness: CWE-918
Which versions are affected by CVE-2026-56227?
How do I fix CVE-2026-56227?
No fix has been published for CVE-2026-56227 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-56227 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56227 exists.
Sources
Also known as GHSA-383x-vh5q-x2q9, GHSA-48hc-53hv-6x3f.