---
cve: "CVE-2026-86716"
severity: "MEDIUM"
cvss: 6.9
epss: "0.3%"
vendor: "Cesanta"
kev: false
exploited: false
published: "2026-09-08 19:20:17"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T14:47:57+02:00"
---

# CVE-2026-86716

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

A vulnerability was determined in Cesanta mJS up to 1.26. Affected is the function skip_spaces_and_comments of the file src/mjs_tok.c. Executing a manipulation can lead to heap-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://vuldb.com/vuln/399773>
- <https://vuldb.com/vuln/399773/cti>
- <https://vuldb.com/cve/CVE-2026-86716>
- <https://vuldb.com/submit/910881>
- <https://vuldb.com/submit/910882>
- <https://github.com/cesanta/mjs/issues/324>
- <https://github.com/cesanta/mjs/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-86716) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_