CVE-2026-100617

High

Description

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.

SeverityHigh

CVSS8.8

Exploit probability33. percentile0.4%

ProductCap-go Capgo.app

PublishedSep 26, 2026

First seenSep 26, 2026

Weakness typeCWE-862Missing authorization

How to fix

Vendor advisories

github.com/Cap-go/capgo.app/security/advisories/GHSA-626c-p6fq-3whq

Affected products

Product	Affected versions	Fixed in
Cap-go capgo.app	0	—

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