CVE-2026-56312

Capgo - Account Creation Before CAPTCHA Validation in accept_invitation Endpoint

State: Published
Severity: 6.9 Medium
Published: Jul 10, 2026
Updated: Jul 10, 2026
Reserved: Jun 20, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N	VulnCheck
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L	VulnCheck

Weaknesses

CWE-287 Improper Authentication

Affected Products

Product	Versions
CapgoCapgo	before 12.128.2Affected 12.128.2Not affected

References

GitHub Security Advisory (GHSA-whc5-fvr7-g5v3)vendor-advisory
VulnCheck Advisory: Capgo - Account Creation Before CAPTCHA Validation in accept_invitation Endpointthird-party-advisory

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