T08 · Insecure Dependencies
- Location
requirements.txt:5- Finding
Unbounded Jinja2 Dependency Permits Installation of Unaudited Future Releases
- Content
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Vulnerability Details
File Location:
requirements.txt:4-5; installation instructions atREADME.md:46-49
Vulnerability Type: Unbounded third-party dependency version
Risk Level: MediumVulnerable Code
text pandas==2.2.0 jinja2>=3.1.6The documented installation procedure executes dependency resolution against the configured Python package index:
bash pip install -r requirements.txtTechnical Analysis
The
jinja2>=3.1.6constraint specifies only a minimum version. It therefore allowspipto install any future Jinja2 release satisfying the constraint, even though that release was not available when this Skill was audited.This contradicts the project's assertion that all dependencies are version-pinned. The dependency is obtained from the package index configured in the user's environment without a lock file or cryptographic hashes. Consequently, installation results may change over time or between environments.
No evidence was found that the currently declared Jinja2 package is malicious. The security weakness is that future dependency contents are not reproducibly constrained or integrity-verified. Exploitation requires compromise of the upstream package, package index, configured mirror, or dependency-resolution environment.
Attack Path
- An attacker compromises a future qualifying Jinja2 release, the configured package repository, or an internal package mirror.
- The attacker publishes or serves a malicious version numbered higher than
3.1.6. - A user or CI runner follows the documented command:
bash pip install -r requirements.txt pipresolves the unbounded constraint to the attacker-controlled release.- The malicious package is installed into the target Python environment.
- Package-controlled code may execute during applicable build or installation processing, or when
scripts/document-generator.pyimports Jinja2.
...[truncated 871 chars]
- Remediation
View remediation
Remediation Suggestions
-
Replace the lower-bound constraint with an exact, reviewed version:
text jinja2==3.1.6 -
Generate and maintain a deterministic lock file containing all transitive dependencies.
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Add SHA-256 hashes for every permitted distribution and require hash verification:
bash pip install --require-hashes -r requirements.txt -
Review and regenerate dependency hashes only through a controlled update process.
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Configure CI to use a trusted package repository or an access-controlled internal mirror.
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Run dependency installation and document generation inside an isolated, non-privileged virtual environment or container without unnecessary secrets.
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Add automated dependency vulnerability and provenance checks to CI, while treating scan metadata in
package.jsonas informational rather than proof of current dependency safety.
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