Broken Object Level Authorization in Capgo Affects Multiple API Endpoints
CVE-2026-56230

8.7HIGH

Key Information:

Vendor

Capgo

Status
Capgo
Vendor
CVE Published:
30 June 2026

What is CVE-2026-56230?

Capgo versions prior to 12.128.2 are vulnerable to a broken object level authorization issue in the middlewareKey() function. This vulnerability arises from the system’s failure to properly validate the ownership of the client-controlled x-limited-key-id header. As a result, authenticated users may exploit this weakness to adopt cross-tenant limited keys by providing another tenant's limited key ID. This allows unauthorized access to cross-tenant resources, potentially compromising sensitive information across multiple API endpoints.

Affected Version(s)

Capgo 0 < 12.128.2

Capgo 12.128.2

References

https://github.com/Cap-go/capgo/security/advisories/GHSA-...
vendor-advisory
https://www.vulncheck.com/advisories/capgo-broken-object-...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Judel777
.