CVE-2026-56312

Medium

Description

Capgo before 12.128.2 contains an improper validation vulnerability in the accept_invitation endpoint that creates user accounts before captcha validation is enforced. Attackers can bypass captcha protection by sending POST requests with invalid captcha tokens to create unwanted accounts and burn invite links.

SeverityMedium

CVSS6.5

Exploit probability32. percentile0.4%

ProductCapgo

PublishedJul 10, 2026

First seenJul 10, 2026

Weakness typeCWE-287Improper authentication

How to fix

Update

Capgo Capgo12.128.2 or later

Vendor advisories

github.com/Cap-go/capgo/security/advisories/GHSA-whc5-fvr7-g5v3

Affected products

Product	Affected versions	Fixed in
Capgo Capgo	v < 12.128.2	12.128.2

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