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Medium · 5.3 CVE-2026-56331 EUVD-2026-40440GHSA-994r-m5r3-f3p9

Capgo - Improper Error Handling in Accept Invitation Endpoint via Invalid Magic String

Published Jun 30, 2026 · Updated Jul 1, 2026 · Assigned by VulnCheck

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.

Affected products

VendorProductAffectedFixed
Capgo Capgo < 12.128.2 12.128.2

References