Vulnerability Description
Giskard is an open-source Python library for testing and evaluating agentic systems. Prior to versions 0.3.4 and 1.0.2b1, ChatWorkflow.chat(message) passes its string argument directly as a Jinja2 template source to a non-sandboxed Environment. A developer who passes user input to this method enables full remote code execution via Jinja2 class traversal. The method name chat and parameter name message naturally invite passing user input directly, but the string is silently parsed as a Jinja2 template, not treated as plain text. This issue has been patched in versions 0.3.4 and 1.0.2b1.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Giskard | Giskard-Agent | < 0.3.4 |
| Giskard | Giskard-Agents | 1.0.1 |
Related Weaknesses (CWE)
References
- https://github.com/Giskard-AI/giskard-oss/security/advisories/GHSA-frv4-x25r-588ExploitVendor AdvisoryMitigation
- https://github.com/Giskard-AI/giskard-oss/security/advisories/GHSA-frv4-x25r-588ExploitVendor AdvisoryMitigation
FAQ
What is CVE-2026-34172?
CVE-2026-34172 is a vulnerability with a CVSS score of 8.8 (HIGH). Giskard is an open-source Python library for testing and evaluating agentic systems. Prior to versions 0.3.4 and 1.0.2b1, ChatWorkflow.chat(message) passes its string argument directly as a Jinja2 tem...
How severe is CVE-2026-34172?
CVE-2026-34172 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34172?
Check the references section above for vendor advisories and patch information. Affected products include: Giskard Giskard-Agent, Giskard Giskard-Agents.