CVE-2026-21448
Published: 02 January 2026
Summary
CVE-2026-21448 is a high-severity Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336) vulnerability in Webkul Bagisto. Its CVSS base score is 8.9 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 47.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).
Deeper analysis
CVE-2026-21448 is a server-side template injection vulnerability (CWE-1336) affecting Bagisto, an open-source Laravel eCommerce platform. Versions prior to 2.3.10 are vulnerable, allowing injection during the customer order process specifically in the "add address" step, where user-supplied input is rendered unsafely in the admin view. The flaw has a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating critical severity with high impacts on confidentiality, integrity, and availability.
A normal customer, without any privileges, can exploit this during the product ordering workflow by injecting malicious payloads into the address field. The injected content executes in the context of the admin view, potentially leading to remote code execution on the server. Attackers require only network access and can trigger the exploit with low complexity and no user interaction.
The official GitHub Security Advisory (GHSA-5j4h-4f72-qpm6) confirms that Bagisto version 2.3.10 addresses the issue with a patch. Security practitioners should upgrade to 2.3.10 or later and review input sanitization in address handling for custom deployments.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-0027
Vulnerability details
Bagisto is an open source laravel eCommerce platform. Versions prior to 2.3.10 are vulnerable to server-side template injection. When a normal customer orders any product, in the `add address` step they can inject a value to run in admin view.…
more
The issue can lead to remote code execution. Version 2.3.10 contains a patch.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE-2026-21448 is a server-side template injection vulnerability in a public-facing eCommerce web application, exploitable unauthenticated over the network to achieve remote code execution, directly mapping to T1190: Exploit Public-Facing Application.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly validates customer inputs like address fields to block malicious server-side template injection payloads before processing.
Filters and encodes user-supplied data when rendered in admin views to neutralize SSTI exploitation leading to RCE.
Mandates timely patching of known flaws, such as upgrading Bagisto to version 2.3.10, to remediate the SSTI vulnerability.