Vulnerability · Published Sep 26, 2026 · Assigned by VulnCheck

CVE-2026-100617Cap-go capgo.app Authorization Bypass via channel_permission_overrides

High 8.8

In plain English

A high-severity missing authorization in capgo.app from Cap-go. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.4%top 67.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Cap-go	capgo.app	0 – through *

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-626c-p6fq-3whq) vendor-advisory
VulnCheck Advisory: Cap-go capgo.app Authorization Bypass via channel_permission_overrides third-party-advisory