CVE-2026-44209: CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine in masci banks
CVE-2026-44209 is a Server-Side Template Injection (SSTI) vulnerability in the masci banks product prior to version 2. 4. 2. The issue arises because the product uses an unsandboxed jinja2. Environment() to render prompt templates, allowing user-supplied template strings to execute arbitrary code. This can lead to remote code execution (RCE) on the host system. The vulnerability has a high severity score of 7. 5. A fix is available in version 2. 4.
AI Analysis
Technical Summary
The masci banks product versions before 2.4.2 use jinja2.Environment() without sandboxing to render prompt templates. When user input is passed directly as the template argument to Prompt(), it enables Server-Side Template Injection (SSTI). This vulnerability allows attackers to execute arbitrary code remotely on the host system. The issue is tracked as CVE-2026-44209 with a CVSS 3.1 score of 7.5 (AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). The vulnerability is fixed in version 2.4.2.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution on the host system, potentially compromising confidentiality, integrity, and availability of the affected system. The CVSS score indicates high impact on confidentiality, integrity, and availability. There are no known exploits in the wild as of the published date.
Mitigation Recommendations
Upgrade the masci banks product to version 2.4.2 or later, where this vulnerability is fixed. Since the vulnerability is resolved in this version, applying this official fix is the recommended remediation. Patch status is confirmed by the vendor advisory stating the fix is included in version 2.4.2.
CVE-2026-44209: CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine in masci banks
Description
CVE-2026-44209 is a Server-Side Template Injection (SSTI) vulnerability in the masci banks product prior to version 2. 4. 2. The issue arises because the product uses an unsandboxed jinja2. Environment() to render prompt templates, allowing user-supplied template strings to execute arbitrary code. This can lead to remote code execution (RCE) on the host system. The vulnerability has a high severity score of 7. 5. A fix is available in version 2. 4.
CVSS v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The masci banks product versions before 2.4.2 use jinja2.Environment() without sandboxing to render prompt templates. When user input is passed directly as the template argument to Prompt(), it enables Server-Side Template Injection (SSTI). This vulnerability allows attackers to execute arbitrary code remotely on the host system. The issue is tracked as CVE-2026-44209 with a CVSS 3.1 score of 7.5 (AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). The vulnerability is fixed in version 2.4.2.
Potential Impact
Successful exploitation of this vulnerability can lead to remote code execution on the host system, potentially compromising confidentiality, integrity, and availability of the affected system. The CVSS score indicates high impact on confidentiality, integrity, and availability. There are no known exploits in the wild as of the published date.
Mitigation Recommendations
Upgrade the masci banks product to version 2.4.2 or later, where this vulnerability is fixed. Since the vulnerability is resolved in this version, applying this official fix is the recommended remediation. Patch status is confirmed by the vendor advisory stating the fix is included in version 2.4.2.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-05T15:13:47.571Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a174b8ce29bf47b50e4a247
Added to database: 5/27/2026, 7:52:44 PM
Last enriched: 5/27/2026, 7:53:04 PM
Last updated: 5/27/2026, 7:53:12 PM
Views: 1
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.