PT-2026-51780 · Cap Go · Cap-Go

Judel777 · Published 2026-06-24 · Updated 2026-06-24 · CVE-2026-56338

NVD

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Fix

Weakness Enumeration

CWE-703

Related Identifiers

CVE-2026-56338

Affected Products

Cap-Go

References · 3

• https://github.com/Cap-go/capgo/security/advisories/GHSA-m53g-7gcj-x6f7 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-56338 · Security Note
• https://vulncheck.com/advisories/capgo-denial-of-service-in-2fa-email-verification-via-auth-v1-otp-endpoint · Note