CVE-2026-44209

Description

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.

CVSS Vector

References

• https://github.com/masci/banks/pull/74
• https://github.com/masci/banks/security/advisories/GHSA-gphh-9q3h-jgpp