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High severity · published Sep 26, 2026
CVE-2026-100617
Cap-go capgo.app Authorization Bypass via channel_permission_overrides
8.8
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
capgo.app · Cap-go
0 · source: vendor
Affected product
CA
capgo.app
Cap-go
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-100617
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-100617
vendor-advisory
https://github.com/Cap-go/capgo.app/security/advisories/GHSA-626c-p6fq-3whq
third-party-advisory
https://www.vulncheck.com/advisories/cap-go-capgo-app-authorization-bypass-via-channel-permission-overrides
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