Unrated severityNVD Advisory· Published Jun 30, 2026· Updated Jul 1, 2026
Capgo - Broken Object Level Authorization via x-limited-key-id Header
CVE-2026-56230
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.
Patches
Vulnerability mechanics
References
2- github.com/Cap-go/capgo/security/advisories/GHSA-cppm-733w-hg86mitrevendor-advisory
- www.vulncheck.com/advisories/capgo-broken-object-level-authorization-via-x-limited-key-id-headermitrethird-party-advisory
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