CVE-2026-56248 Capgo - Unauthenticated Denial-of-Service via audit_logs RLS Policy
Unauthenticated attackers can cause denial of service by triggering expensive database queries that exhaust resources via the audit_logs endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56248?
CVE-2026-56248 is a high-severity denial of service vulnerability in Cap-go capgo, published on 23 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cap-go capgo (capgo-backend) before 12.128.12 contains an unauthenticated denial-of-service vulnerability arising from the audit_logs table's Row-Level Security (RLS) policy when accessed via the Supabase PostgREST API. Because the PostgreSQL query planner executes costly logic before RLS rejection, unfiltered queries to the public.audit_logs endpoint using the public anon key consistently trigger statement timeouts (PostgREST error 57014). Under concurrency, this exhausts database resources and causes cascading HTTP 500 failures on unrelated endpoints (e.g. /orgs), resulting in an application-layer denial of service.
Weakness: CWE-400
Which versions are affected by CVE-2026-56248?
How do I fix CVE-2026-56248?
No fix has been published for CVE-2026-56248 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-2026-56248 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56248 exists.
Sources
Also known as GHSA-5vgv-rqj5-5748, GHSA-rp66-wcx8-j4pj.