---
cve: "CVE-2026-56706"
severity: "MEDIUM"
cvss: 6.1
epss: "0.3%"
vendor: "vrana"
kev: false
exploited: false
published: "2026-08-25 02:16:42"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-29T22:04:30+02:00"
---

# CVE-2026-56706

> 6.1 MEDIUM · 🧪 PoC

## Beschreibung

Adminer before 5.4.3 uses a CSRF token scheme that transmits both the XOR mask and the masked value in every token (format (rand XOR secret):rand), allowing anyone who observes a single CSRF token (e.g., via network sniffing, log files, Referrer header, or XSS) to recover the session secret with a single XOR operation and forge unlimited valid tokens. The implementation is further weakened by a low-entropy session token (rand(1,1e6), ~20 bits) that permits blind brute-force, and by use of loose comparison (==) in token verification, enabling PHP type juggling. Exploitation enables cross-site request forgery against authenticated sessions, including execution of arbitrary SQL queries.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/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 |

## Patch verfügbar (OSV)

- 189869c4a8f0f897848cdb58493b572178084d6c (Commit)

## Referenzen

- <https://github.com/vrana/adminer/security/advisories/GHSA-33j4-hc95-pggg>
- <https://www.vulncheck.com/advisories/adminer-before-csrf-token-secret-recovery-via-xor-masking>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-56706) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_