CVE-2026-25526 CRITICAL

CVE-2026-25526: JinJava Bypass through ForTag leads to Arbitrary Java Execution

Vendor Hubspot
Product jinjava
Weakness CWE-1336
Published February 4, 2026
Last update February 5, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

Description

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.

Key dates

Disclosure timeline

February 4, 2026 CVE published
February 5, 2026 Record updated