Giskard has Unsandboxed Jinja2 Template Rendering in ConformityCheckGHSA-7xjm-g8f4-rp26
HIGHGHSA-7xjm-g8f4-rp26 is a high-severity (CVSS 7.8) CWE-1336 vulnerability in giskard-checks. A fix is available for giskard-checks — see the affected versions and patch details below.
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-7xjm-g8f4-rp26.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
giskard-checksReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
Summary
The ConformityCheck class in giskard-checks rendered the rule parameter through Jinja2's default Template() constructor. Because the rule string is silently interpreted as a Jinja2 template, a developer may not realize that template expressions embedded in rule definitions are evaluated at runtime. In a scenario where check definitions are loaded from an untrusted source (e.g. a shared project file or externally contributed configuration), this could lead to arbitrary code execution.
giskard-checks is a local developer testing library with no network-facing service. Check definitions, including the rule parameter, are provided in application code or project configuration files and executed locally. Exploitation requires write access to a check definition and subsequent execution of the test suite by a developer.
However, the implicit template evaluation of the rule parameter is not obvious from the API surface. This hidden behavior increases the likelihood of a developer inadvertently passing untrusted input to it when integrating the library into a larger system.
Affected Component
conformity.py, line 59:
from jinja2 import Template
...
formatted_rule = Template(self.rule).render(trace=trace)
Affected Versions
giskard-checks < 1.0.2b1
Patched Version
giskard-checks >= 1.0.2b1 (template parsing removed from rule evaluation entirely)
Remediation
Upgrade to giskard-checks >= 1.0.2b1. The template rendering has been removed from rule evaluation.
Credit
Giskard-AI thanks @dhabaleshwar for identifying the unsandboxed template usage.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | giskard-checks | all versions | 1.0.2b1pip install --upgrade 'giskard-checks==1.0.2b1' |
Affected Products
giskardgiskardDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for giskard-checks, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update giskard-checks to 1.0.2b1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7xjm-g8f4-rp26 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is GHSA-7xjm-g8f4-rp26 in your dependencies?
Find it across PyPI, including transitive dependencies.