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Vulnerability record · CVE-2026-25526 · published 4 February 2026

CVE-2026-25526: Hubspot jinjava vulnerability

Hubspot · Jinjava

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.

9.8 CVSS 3.1 Critical EPSS 0.92% · top 41.4% CWE-1336 · CWE-1336
9.8CVSS 3.1 base score
0.92%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/HubSpot/jinjava/commit/3d02e504d8bbb13bf3fe019e9ca7b51dfce7a998 Patch
https://github.com/HubSpot/jinjava/commit/c7328dce6030ac718f88974196035edafef24441 Patch
https://github.com/HubSpot/jinjava/releases/tag/jinjava-2.7.6 ProductRelease Notes
https://github.com/HubSpot/jinjava/releases/tag/jinjava-2.8.3 ProductRelease Notes
https://github.com/HubSpot/jinjava/security/advisories/GHSA-gjx9-j8f8-7j74 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-25526), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.