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Sunday, 13 September 2026
8 agent hacks today▲ 7 vs yesterday (1)
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Incident database

Giskard library flaw: ChatWorkflow.chat renders input as Jinja2 template enabling RCE

Giskard, an open-source Python library for testing and evaluating agentic systems, passed the string argument of ChatWorkflow.chat(message) directly to a non-sandboxed Jinja2 environment, so any user input reaching that method could achieve remote code execution via Jinja2 class traversal. The issue (CVE-2026-34172) was patched in versions 0.3.4 and 1.0.2b1.

Disclosed 31 March 2026 · Record updated 13 September 2026

Impact

Developers passing user input to ChatWorkflow.chat could be exposed to full remote code execution through server-side template injection.

Our coverage

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Sources

  1. nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-34172