{"id":"CVE-2026-100617","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-100617","generatedAt":"2026-10-28T00:59:29.563Z","title":"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.","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.","published":"2026-09-26T14:16:42.000Z","lastModified":"2026-09-30T18:18:00.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","vector":"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/M"},"cwe":["CWE-862"],"affected":[],"epss":{"score":0.00383,"percentile":0.32126,"date":"2026-10-26","history":[{"date":"2026-09-27","score":0.00303,"percentile":0.20678}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.38%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-26T14:16:42.000Z","detail":{"score":"8.7","severity":"HIGH","publishedAt":"2026-09-26T14:16:42.467Z"},"summary":"New CVE, high severity (CVSS 8.7)."}],"references":[{"url":"https://github.com/Cap-go/capgo.app/security/advisories/GHSA-626c-p6fq-3whq","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/cap-go-capgo-app-authorization-bypass-via-channel-permission-overrides","source":"disclosure@vulncheck.com"},{"url":"https://github.com/Cap-go/capgo.app/security/advisories/GHSA-626c-p6fq-3whq","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-100617","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}