CVE-2026-56237
CRITICALCapgo - Unauthenticated API Key Generation via Client-Side Parameter Manipulation
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-22w2-mx2h-4fr7)
https://github.com/Cap-go/capgo/security/advisories/GHSA-22w2-mx2h-4fr7
Third Party Advisory third-party-advisory
VulnCheck Advisory: Capgo - Unauthenticated API Key Generation via Client-Side Parameter Manipulation
https://www.vulncheck.com/advisories/capgo-unauthenticated-api-key-generation-via-client-side-parameter-manipulation
Scores
CVSS v3
9.1
EPSS
0.0029
EPSS Percentile
21.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
total
Details
CWE
CWE-287
Status
published
Products (2)
Capgo/Capgo
< 12.128.2
Capgo/Capgo
12.128.2
Published
Jun 24, 2026
Tracked Since
Jun 24, 2026