CVE-2026-56307 Cap-go - Broken Cursor Pagination in /private/devices Endpoint
Authenticated attackers can trigger infinite pagination loops in the device management endpoint, causing denial of service.
- 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-2026-56307?
CVE-2026-56307 is a medium-severity denial of service vulnerability in Cap-go capgo, published on 20 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Cap-go before 12.128.12 contains a broken cursor pagination vulnerability in the /private/devices endpoint on the Cloudflare/workerd path that allows authenticated attackers to cause duplicate-page loops and make later rows unreachable. Attackers with app.read_devices access can exploit non-advancing cursor filters to trigger infinite pagination loops, prevent dataset traversal, and cause repeated processing in device-management workflows.
Weakness: CWE-670
Which versions are affected by CVE-2026-56307?
How do I fix CVE-2026-56307?
No fix has been published for CVE-2026-56307 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-56307 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56307 exists.
Sources
Also known as GHSA-8p6w-x7jg-v4xq, GHSA-gh9r-qcpc-q754.