---
cve: "CVE-2026-23736"
severity: "HIGH"
cvss: 7.3
epss: "0.3%"
vendor: "lxsmnsyc"
kev: false
exploited: false
published: "2026-01-21 23:15:52"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-08T11:46:45+02:00"
---

# CVE-2026-23736

> 7.3 HIGH · 🧪 PoC

## Beschreibung

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **yes**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- ce9408ebc87312fcad345a73c172212f2a798060 (Commit)

## Referenzen

- <https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hj76-42vx-jwp4>
- <https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-23736/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_