CVE-2026-56234 Capgo CVE debrief

Who should care

Organizations using Capgo should prioritize patching and updating to version 12.128.2 or later to prevent exploitation of this vulnerability. Additionally, defenders should monitor for suspicious activity and implement compensating controls to prevent exploitation. Security teams should also review their inventory of Capgo instances to ensure they are up-to-date and not vulnerable.

Technical summary

The vulnerability exists in the POST /functions/v1/private/validate_password_compliance endpoint of Capgo, which is callable using only the public Supabase key without authentication. The endpoint is CORS-permissive with wildcard origin allowance and lacks rate limiting, allowing attackers to perform password spraying and credential stuffing attacks. The vulnerability has a CVSS score of 6.9 and a severity of MEDIUM. The CVE record and NVD detail provide additional information about the vulnerability.

Defensive priority

Defenders should prioritize patching and updating Capgo to version 12.128.2 or later to prevent exploitation of this vulnerability. Additionally, defenders should monitor for suspicious activity and implement compensating controls to prevent exploitation.

Recommended defensive actions

• Patch or update Capgo to version 12.128.2 or later
• Monitor for suspicious activity
• Implement compensating controls to prevent exploitation
• Review inventory of Capgo instances to ensure they are up-to-date and not vulnerable
• Implement rate limiting on the POST /functions/v1/private/validate_password_compliance endpoint

Evidence notes

The CVE record and NVD detail provide additional information about the vulnerability. The source item URL provides additional metadata about the vulnerability. The source references provide additional information about the vulnerability and its impact.

Official resources