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CVE-2026-44209

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

Published: May 26, 2026Updated: May 26, 2026 Sources: CVE List NVD
NVD MITRE
7.5CVSS
HIGH

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

CWE-1336

Affected Products

banks
masci

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

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

Timeline

Published
May 26, 2026
Last Updated
May 26, 2026

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