---
cve: "CVE-2026-88860"
severity: "CRITICAL"
cvss: 9.3
epss: "0.3%"
vendor: "Cap-go"
kev: false
exploited: false
published: "2026-09-10 14:17:11"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-05T03:15:25+02:00"
---

# CVE-2026-88860

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

Capgo fails to clean up channel permission overrides when a user's last organization role binding is deleted, leaving stale overrides active. Attackers can retain channel-specific permissions after their base RBAC access has been revoked to perform unauthorized actions like changing production OTA versions.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-09-30 17:20:32
- CNA-CVSS: **9.3** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **yes**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://github.com/Cap-go/capgo.app/security/advisories/GHSA-qfxq-2ch8-hjg9>
- <https://www.vulncheck.com/advisories/capgo-authorization-bypass-via-stale-channel-permission-overrides>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-88860) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_