CVE-2026-25526
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Hubspot Jinjava
PublishedFeb 4, 2026
First seenFeb 4, 2026
Weakness typeCWE-1336CWE-1336
How to fix
Update
- hubspot jinjava2.7.6, 2.8.3 or later
- com.hubspot.jinjava:jinjava2.8.3, 2.7.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| hubspot jinjava | v < 2.7.6, 2.8.0 ≤ v < 2.8.3 | 2.7.6, 2.8.3 |
| com.hubspot.jinjava:jinjavaMaven | 2.8.0 ≤ v < 2.8.3, v < 2.7.6 | 2.8.3, 2.7.6 |
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