CVE-2026-56338

Description

Capgo before 12.128.2 contains a denial of service vulnerability in the /auth/v1/otp endpoint that prevents email verification for two-factor authentication due to captcha validation failures. Authenticated users cannot complete 2FA enrollment as the backend consistently returns HTTP 500 errors with captcha verification process failed messages, blocking access to security controls.

CVSS Vector

References

• https://github.com/Cap-go/capgo/security/advisories/GHSA-m53g-7gcj-x6f7
• https://www.vulncheck.com/advisories/capgo-denial-of-service-in-2fa-email-verification-via-auth-v1-otp-endpoint
• https://github.com/Cap-go/capgo/security/advisories/GHSA-m53g-7gcj-x6f7