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

CVE-2026-44209: SSTI to RCE in banks LLM prompt template library

Versions of the banks LLM prompt-templating library before 2.4.2 rendered prompt templates with an unsandboxed jinja2.Environment(), so applications passing user-supplied strings as templates to Prompt() were vulnerable to server-side template injection leading to remote code execution. The issue is fixed in version 2.4.2.

Disclosed 26 May 2026 · Record updated 13 September 2026

Impact

Server-side template injection in prompt rendering could allow remote code execution on the host system of applications using banks with user-supplied templates.

Our coverage

No articles linked to this incident yet.

Sources

  1. nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-44209