---
cve: "CVE-2026-5759"
severity: "CRITICAL"
cvss: 9.3
epss: "0.5%"
vendor: "FalkorDB"
kev: false
exploited: false
published: "2026-10-09 05:16:44"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-11-08T00:11:24+01:00"
---

# CVE-2026-5759

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

A double free and use-after-free vulnerability in the RdbLoadDeletedNodes function of the RDB graph decoders (src/serializers/decoders/*/decode_graph_entities.c) in FalkorDB before 4.18.1 allows a remote attacker who can issue Redis replication commands (for example, against an instance with no password configured) to cause a denial of service or execute arbitrary code in the redis-server process by supplying a crafted RDB stream whose deleted-nodes buffer length is not a multiple of sizeof(NodeID). The length check relies on ASSERT(), which is compiled out in release builds, so the function continues after freeing the buffer, reading it and freeing it a second time.

## CNA-Record (Kanon, cvelistV5)

- CNA: **securin**
- State: PUBLISHED
- Stand: 2026-10-13 17:01:45
- 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 |

## Schwachstellen-Klasse

- **CWE-415** — Double Free
  The product calls free() twice on the same memory address.
- **CWE-416** — Use After Free
  The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

## Patch verfügbar (OSV)

- 83a77dfb95bc40be98080dd5abdcc904dfcaf75a (Commit)
- 523d98ac7ffe99f11a9c95c258025c235f0dff4c (Commit)

## Referenzen

- <https://github.com/FalkorDB/FalkorDB/pull/1843>
- <https://github.com/FalkorDB/FalkorDB/commit/523d98ac7ffe99f11a9c95c258025c235f0dff4c>
- <https://github.com/FalkorDB/FalkorDB/releases/tag/v4.18.1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-5759/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_