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Vulnerability record · CVE-2026-100617 · published 26 September 2026

CVE-2026-100617: Missing authorization vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.30% · top 79.3% CWE-862 · Missing authorization Received
8.7CVSS 4.0 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
26 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/Cap-go/capgo.app/security/advisories/GHSA-626c-p6fq-3whq
https://www.vulncheck.com/advisories/cap-go-capgo-app-authorization-bypass-via-channel-permission-overrides

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Source: NIST National Vulnerability Database (record CVE-2026-100617), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.