---
cve: "CVE-2026-116733"
severity: "MEDIUM"
cvss: 6.3
epss: ""
vendor: "Dvidelabs"
kev: false
exploited: false
published: "2026-10-26 22:16:57"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-28T02:19:39+01:00"
---

# CVE-2026-116733

> 6.3 MEDIUM · 🧪 PoC

## Beschreibung

flatcc through 0.6.4 contains an out-of-bounds read vulnerability in __flatcc_json_parser_number that allows attackers to read past the input buffer via numbers ending in a decimal point. Attackers can supply untrusted JSON ending immediately after a decimal point to generated parsers, crashing applications when the buffer ends at an unmapped page.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-10-26 21:52:34
- CNA-CVSS: **6.3** (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N`)

## CVSS-Vektor

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

## Schwachstellen-Klasse

- **CWE-125** — Out-of-bounds Read
  The product reads data past the end, or before the beginning, of the intended buffer.

## Angriffsmuster (CAPEC)

- [CAPEC-540 — Overread Buffers](https://capec.mitre.org/data/definitions/540.html) _(Severity: High)_

## Patch verfügbar (OSV)

- 356792dc155a9e685acdfe0ec1e209bdadcb4ab9

## Referenzen

- <https://github.com/dvidelabs/flatcc/commit/356792dc155a9e685acdfe0ec1e209bdadcb4ab9>
- <https://github.com/dvidelabs/flatcc>
- <https://github.com/dvidelabs/flatcc/blob/v0.6.4/src/runtime/json_parser.c#L539-L543>
- <https://hackmd.io/@haindpwn/flatcc-json-number-oob-read>
- <https://www.vulncheck.com/advisories/flatcc-through-0.6.4-out-of-bounds-read-via-flatcc-json-parser-number>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-116733/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_