CVE-2026-40320 MEDIUM

CVE-2026-40320: Giskard has an Unsandboxed Jinja2 Template Rendering in ConformityCheck

Vendor Giskard-Ai
Product giskard-oss
Weakness CWE-1336
Published April 17, 2026
Last update April 20, 2026

CVSS base score

5.4/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L

What the vulnerability does

01Description

Giskard is an open-source testing framework for AI models. In versions prior to 1.0.2b1, the ConformityCheck class rendered the rule parameter through Jinja2's default Template() constructor, silently interpreting template expressions at runtime. If check definitions are loaded from an untrusted source, a crafted rule string could achieve arbitrary code execution. Exploitation requires write access to a check definition and subsequent execution of the test suite. This issue has been fixed in giskard-checks version 1.0.2b1.

Key dates

02Disclosure timeline

April 17, 2026 CVE published
April 20, 2026 Record updated