---
id: CVE-2026-56252
title: >-
  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
summary: >-
  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…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-863
published: '2026-07-12'
updated: '2026-07-12'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56252'
references:
  - url: 'https://github.com/Cap-go/capgo/security/advisories/GHSA-qvr7-f6j6-64wp'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/capgo-scope-isolation-failure-in-webhook-test-endpoint
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-07-12T12:20:13.242Z'
epss: 0.00282
epssPercentile: 0.1843
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.