CVE-2026-56237CWE-287

Capgo - Unauthenticated API Key Generation via Client-Side Parameter Manipulation

Critical · published June 24, 2026

CVSS v4.0
9.3
EPSS
1%
Percentile
43.2
In the wild
Unconfirmed
What it is

Capgo before 12.128.2 contains a broken authentication vulnerability in its API key generation mechanism. API keys are exposed in frontend requests, and the backend fails to validate that keys are securely generated and bound to the authenticated user. An attacker can tamper with the API key parameter in the generation request and supply arbitrary values, generating custom API keys without proper authorization, which can lead to unauthorized access to protected endpoints.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00517 · 43.2th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-06-24T11:53Z
EPSS history
Timeline
  • 24 JUN 11:53Z
    Capgo - Unauthenticated API Key Generation via Client-Side Parameter Manipulation
    cvelistv5