CVE-2026-56331

Medium

Description

Capgo before 12.128.2 contains improper error handling in the /private/accept_invitation endpoint that returns HTTP 500 instead of safe 4xx errors when magic_invite_string is invalid. Attackers can trigger this vulnerability using only the public key by submitting malformed magic_invite_string values to cause server errors and leak internal processing details.

SeverityMedium

CVSS5.3

Exploit probability—

ProductCapgo

PublishedJun 30, 2026

First seenJun 30, 2026

Weakness typeCWE-209CWE-209

How to fix

Update

Capgo Capgo12.128.2 or later

Vendor advisories

github.com/Cap-go/capgo/security/advisories/GHSA-34p8-fh3m-376x

Affected products

Product	Affected versions	Fixed in
Capgo Capgo	v < 12.128.2	12.128.2

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