Capgo - Broken Object Level Authorization via x-limited-key-id Header | Advisories

Advisories

Capgo - Broken Object Level Authorization via x-limited-key-id Header

severity: high
date: 6/30/2026
Affecting: Capgo >= 0, < 12.128.2
CVE: CVE-2026-56230
CWE: CWE-639 Authorization Bypass Through User-Controlled Key
CVSS: 8.7
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References: GitHub Security Advisory (GHSA-cppm-733w-hg86)
Credit: Judel777
Description: Capgo before 12.128.2 contains a broken object level authorization vulnerability in middlewareKey() that accepts the client-controlled x-limited-key-id header without validating ownership, allowing authenticated users to adopt cross-tenant limited keys. Attackers can supply another tenant's limited key ID to bypass authorization checks and access unauthorized cross-tenant resources across multiple API endpoints.

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