CVE-2026-56243 Capgo - Hashed API Key Enforcement Bypass via PostgREST/RLS Plane
Attackers bypass hashed API key enforcement by sending plaintext keys to the PostgREST plane, accessing protected resources in Capgo.
- 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-2026-56243?
CVE-2026-56243 is a high-severity authentication bypass vulnerability in Capgo, published on 23 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 security control bypass vulnerability where the PostgREST/RLS plane accepts plaintext API keys through the capgkey header despite enforce_hashed_api_keys being enabled. Attackers can bypass org-level hashed-key enforcement by sending plaintext API keys directly to the PostgREST/RLS plane to access protected resources.
Weakness: CWE-288
Which versions are affected by CVE-2026-56243?
How do I fix CVE-2026-56243?
No fix has been published for CVE-2026-56243 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-56243 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56243 exists.
Sources
Also known as GHSA-2c7m-fxr4-462c, GHSA-6g74-8cpq-g2c8.