CVE-2026-44209

HIGH

Banks: Critical Remote Code Execution (RCE) via Jinja2 SSTI

Title source: cna

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.

References (5)

Core 5

Core References

Vendor Advisory

https://access.redhat.com/security/cve/CVE-2026-44209

Vendor Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2481713

Vendor Advisory

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44209.json

X_Refsource_Confirm x_refsource_confirm

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

X_Refsource_Misc x_refsource_misc

https://github.com/masci/banks/pull/74

Scores

CVSS v3 7.5

EPSS 0.0054

EPSS Percentile 42.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-1336 CWE-917

Status published

Products (2)

masci/banks < 2.4.2

pypi/banks 0 - 2.4.2PyPI

Published May 26, 2026

Tracked Since May 27, 2026