---
id: CVE-2026-100617
title: >-
  Cap-go capgo.app fails to validate that principals in
  channel_permission_overrides belong to the organization, allowing
  authenticated app/org admins to grant channel permissions to non-member users
summary: >-
  Cap-go capgo.app fails to validate that principals in
  channel_permission_overrides belong to the organization, allowing
  authenticated app/org admins to grant channel permissions to non-member users.
  Attackers with admin privileges can in…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-862
vendor: Cap-go
product: capgo.app
affected:
  - capgo.app
published: '2026-09-26'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T14:16:42.467'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100617'
references:
  - url: >-
      https://github.com/Cap-go/capgo.app/security/advisories/GHSA-626c-p6fq-3whq
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/cap-go-capgo-app-authorization-bypass-via-channel-permission-overrides
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-26T13:33:20.930Z'
---

## Overview

Cap-go capgo.app fails to validate that principals in channel_permission_overrides belong to the organization, allowing authenticated app/org admins to grant channel permissions to non-member users. Attackers with admin privileges can insert override rows with arbitrary external user UUIDs to grant channel-scoped permissions such as channel.promote_bundle to users outside the organization.

## Remediation

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