High severity · published May 26, 2026
CVE-2026-44209
Banks: Critical Remote Code Execution (RCE) via Jinja2 SSTI
7.5
CVSS
0.4%
EPSS
No
On KEV
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
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BA
banks · masci
< 2.4.2 · source: vendor
EI
Exploit Intelligence · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Ansible Automation Platform 2 · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44209
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44209
github.com
https://github.com/masci/banks/pull/74
github.com
https://github.com/masci/banks/security/advisories/GHSA-gphh-9q3h-jgpp
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-44209
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2481713
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44209.json
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