CVE-2026-56252
MEDIUMCapgo - Scope Isolation Failure in Webhook Test Endpoint
Title source: cnaDescription
Capgo before 12.128.2 contains a scope isolation vulnerability in the POST /webhooks/test endpoint that allows app-scoped API keys to invoke org-scoped webhook operations. Attackers with app-scoped credentials can trigger signed outbound webhook deliveries for arbitrary organization webhooks outside their declared app boundary, bypassing the limited_to_apps authorization check.
References (2)
Core 2
Core References
Third Party Advisory third-party-advisory
VulnCheck Advisory: Capgo - Scope Isolation Failure in Webhook Test Endpoint
https://www.vulncheck.com/advisories/capgo-scope-isolation-failure-in-webhook-test-endpoint
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-qvr7-f6j6-64wp)
https://github.com/Cap-go/capgo/security/advisories/GHSA-qvr7-f6j6-64wp
Scores
CVSS v3
5.4
EPSS
0.0017
EPSS Percentile
6.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-863
Status
published
Products (2)
Capgo/Capgo
< 12.128.2
Capgo/Capgo
12.128.2
Published
Jul 12, 2026
Tracked Since
Jul 12, 2026