CVE-2026-56231 Capgo - Broken Object Level Authorization in Build Job Control via jobId Parameter
Authenticated users can start or cancel arbitrary build jobs of other tenants by manipulating the jobId parameter, causing cross-tenant denial of service and unauthorized actions.
- 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-2026-56231?
CVE-2026-56231 is a high-severity missing authorization vulnerability in Capgo, published on 24 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 broken object level authorization (BOLA) vulnerability in the POST /build/start/:jobId and POST /build/cancel/:jobId endpoints. The handlers authorize the request based only on the attacker-controlled app_id supplied in the request body and never verify that the jobId in the URL belongs to that app_id (or the same tenant/org) before issuing privileged builder commands with the server-held builder API key. An authenticated user with the app.build_native permission for any app they control can start or cancel arbitrary builder jobs belonging to other tenants by supplying a victim jobId, resulting in cross-tenant build sabotage (denial of service), unauthorized compute actions, and potential billing impact.
Weakness: CWE-285
Which versions are affected by CVE-2026-56231?
How do I fix CVE-2026-56231?
No fix has been published for CVE-2026-56231 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-2026-56231 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56231 exists.
Sources
Also known as GHSA-72j4-9qp5-hfrg.