---
cve: "CVE-2026-63756"
severity: "CRITICAL"
cvss: 9.2
epss: "0.4%"
vendor: "surrealdb"
kev: false
exploited: false
published: "2026-07-20 12:19:45"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-04T20:10:25+02:00"
---

# CVE-2026-63756

> 9.2 CRITICAL · 🧪 PoC

## Beschreibung

SurrealDB versions before 3.1.0 contain a time-of-check/time-of-use race condition in the HTTP /rpc endpoint that allows unauthenticated requests to inherit authenticated session state. Unauthenticated attackers can send concurrent requests to the /rpc endpoint while legitimate authenticated traffic is active to execute operations with hijacked user privileges.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:H/AT:P/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 | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://github.com/surrealdb/surrealdb/security/advisories/GHSA-4vgr-h27g-cf9p>
- <https://www.vulncheck.com/advisories/surrealdb-before-privilege-escalation-via-rpc-session-race-condition>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-63756) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_