CVE-2026-44209 — Banks: Critical Remote Code Execution (RCE) via Jinja2 SSTI
Banks generates meaningful LLM prompts using a template language that makes sense. Prior to 2.4.2, banks uses jinja2.Environment() (unsandboxed) to render prompt templates. Appl…
Published: 2026-05-26 · CVSS: 7.5 · CVSS 3.1
Banks generates meaningful LLM prompts using a template language that makes sense. Prior to 2.4.2, banks uses jinja2.Environment() (unsandboxed) to render prompt templates. Applications that pass user-supplied strings as the template argument to Prompt() are vulnerable to Server-Side Template Injection (SSTI), which can lead to Remote Code Execution (RCE) on the host system. This vulnerability is fixed in 2.4.2.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7