CVE-2026-44209
HIGHBanks: Critical Remote Code Execution (RCE) via Jinja2 SSTI
Title source: cnaDescription
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 (2)
Core 2
Core References
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
0.0042
EPSS Percentile
33.1%
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
Status
published
Products (2)
masci/banks
< 2.4.2
pypi/banks
0 - 2.4.2PyPI
Published
May 26, 2026
Tracked Since
May 27, 2026