# CVE-2026-56338

## Summary

- **CVE ID:** CVE-2026-56338
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N)
- **CWE:** CWE-703
- **Published:** Jun 24, 2026
- **Last Modified:** Jun 24, 2026

## 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.

## Affected Products

- Capgo — Capgo (0)
- Capgo — Capgo (12.128.2)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.49%
- **EPSS Percentile:** 40.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._