CVE-2026-56331CWE-209

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

Medium · published June 30, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
26.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
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
EPSS
0.00343 · 26.6th percentile
Weakness
CWE-209 · Generation of Error Message Containing Sensitive Information
Published
2026-06-30T22:08Z
EPSS history
Timeline
  • 30 JUN 22:08Z
    Capgo - Improper Error Handling in Accept Invitation Endpoint via Invalid Magic String
    cvelistv5