CVE-2026-56252 Capgo - Scope Isolation Failure in Webhook Test Endpoint
Attackers with app-scoped API keys can bypass authorization checks to trigger outbound webhook deliveries for arbitrary organization webhooks.
- 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-2026-56252?
CVE-2026-56252 is a medium-severity missing authorization vulnerability in Capgo, published on 12 Jul 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 scope isolation vulnerability in the POST /webhooks/test endpoint that allows app-scoped API keys to invoke org-scoped webhook operations. Attackers with app-scoped credentials can trigger signed outbound webhook deliveries for arbitrary organization webhooks outside their declared app boundary, bypassing the limited_to_apps authorization check.
Weakness: CWE-863
Which versions are affected by CVE-2026-56252?
How do I fix CVE-2026-56252?
No fix has been published for CVE-2026-56252 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-2026-56252 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56252 exists.
Sources
Also known as GHSA-4w58-4949-9w2m, GHSA-qvr7-f6j6-64wp.