SB2026100938 - Server-side template injection in Linked Field module for Drupal
Published: October 9, 2026
Security Bulletin ID
SB2026100938
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Neutralization of Special Elements Used in a Template Engine (CVE-ID: CVE-2026-107259)
CWE-ID: CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to insufficient separation of field content from template code when rendering linked field output. A remote user can inject malicious Twig template and expose site configuration values.
Remediation
Install update from vendor's website.