---
cve: "CVE-2026-56245"
severity: "HIGH"
cvss: 8.8
epss: "0.5%"
vendor: "Cap-go"
kev: false
exploited: false
published: "2026-06-24 11:53:11"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-29T06:30:21+02:00"
---

# CVE-2026-56245

> 8.8 HIGH · 🧪 PoC

## Beschreibung

Supabase Capgo before 12.128.2 contains an authorization bypass vulnerability in the SECURITY DEFINER record_build_time RPC function that allows unauthenticated attackers to insert arbitrary build-time records. Attackers can exploit this by calling POST /rest/v1/rpc/record_build_time with a public API key to poison billing and quota data for any organization, enabling resource exhaustion and cross-tenant billing manipulation.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **yes**
  - Technical Impact: **partial**

## CVSS-Vektor

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

## Patch verfügbar (OSV)

- 6685e5f11adef257bf3d085e481f4d8ebcec602e (Commit)

## Referenzen

- <https://github.com/Cap-go/capgo/security/advisories/GHSA-42f8-v563-5763>
- <https://www.vulncheck.com/advisories/supabase-capgo-unauthenticated-cross-tenant-build-time-accounting-poisoning-via-record-build-time-rpc>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-56245) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_