CVE-2026-56331 MEDIUM

CVE-2026-56331: Capgo - Improper Error Handling in Accept Invitation Endpoint via Invalid Magic String

Vendor Capgo
Product Capgo
Weakness CWE-209 · Error message info leak
Published June 30, 2026
Last update July 1, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 30, 2026 CVE published
July 1, 2026 Record updated