CVE-2026-56338

Medium

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.

SeverityMedium

CVSS5.3

Exploit probability—

ProductCapgo

PublishedJun 24, 2026

First seenJun 24, 2026

Weakness typeCWE-703CWE-703

How to fix

Update

Capgo Capgo12.128.2 or later

Vendor advisories

github.com/Cap-go/capgo/security/advisories/GHSA-m53g-7gcj-x6f7

Affected products

Product	Affected versions	Fixed in
Capgo Capgo	v < 12.128.2	12.128.2

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