CVE-2026-100617 Cap-go capgo.app Authorization Bypass via channel_permission_overrides
Authenticated admins can grant channel permissions to external users by bypassing organization membership validation in Cap-go.
- 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-2026-100617?
CVE-2026-100617 is a high-severity missing authorization vulnerability in Cap-go capgo.app, published on 26 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Cap-go capgo.app fails to validate that principals in channel_permission_overrides belong to the organization, allowing authenticated app/org admins to grant channel permissions to non-member users. Attackers with admin privileges can insert override rows with arbitrary external user UUIDs to grant channel-scoped permissions such as channel.promote_bundle to users outside the organization.
Weakness: CWE-862
Which versions are affected by CVE-2026-100617?
How do I fix CVE-2026-100617?
No fix has been published for CVE-2026-100617 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-2026-100617 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100617 exists.
Sources
Also known as GHSA-49mf-2v7h-44ph.