---
cve: "CVE-2026-25526"
severity: "CRITICAL"
cvss: 9.8
epss: "0.9%"
vendor: "HubSpot"
kev: false
exploited: false
published: "2026-02-04 22:15:59"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-28T04:43:13+01:00"
---

# CVE-2026-25526

> 9.8 CRITICAL · 🧪 PoC

## Beschreibung

JinJava is a Java-based template engine based on django template syntax, adapted to render jinja templates. Prior to versions 2.7.6 and 2.8.3, JinJava is vulnerable to arbitrary Java execution via bypass through ForTag. This allows arbitrary Java class instantiation and file access bypassing built-in sandbox restrictions. This issue has been patched in versions 2.7.6 and 2.8.3.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-02-05 21:01:00
- CNA-CVSS: **9.8** (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)

## CISA-Anreicherung (vulnrichment/ADP)

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

## CVSS-Vektor

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

| 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 | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-1336** — Improper Neutralization of Special Elements Used in a Template Engine
  The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.

## Patch verfügbar (OSV)

- df6d0c6a58f23e106b154acf4a3466af83108983
- 867dde7725b86829ad64d609d916c16d2b8b5d59

## Referenzen

- <https://github.com/HubSpot/jinjava/security/advisories/GHSA-gjx9-j8f8-7j74>
- <https://github.com/HubSpot/jinjava/commit/3d02e504d8bbb13bf3fe019e9ca7b51dfce7a998>
- <https://github.com/HubSpot/jinjava/commit/c7328dce6030ac718f88974196035edafef24441>
- <https://github.com/HubSpot/jinjava/releases/tag/jinjava-2.7.6>
- <https://github.com/HubSpot/jinjava/releases/tag/jinjava-2.8.3>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-25526/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_