CVE-2026-100617CWE-862broken-access-control

CVE-2026-100617

High · published September 26, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
21.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00303 · 21.9th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-09-26T18:16Z
References (3)
https://github.com/Cap-go/capgo.app/security/advisories/GHSA-626c-p6fq-3whq · [email protected]https://www.vulncheck.com/advisories/cap-go-capgo-app-authorization-bypass-via-channel-permission-overrides · [email protected]https://github.com/Cap-go/capgo.app/security/advisories/GHSA-626c-p6fq-3whq · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 28 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 26 SEP 13:22Z
    Cap-go capgo.app Authorization Bypass via channel_permission_overrides
    cvelistv5