SB2026092441 - Denial of service in Combined image style module for Drupal
Published: September 24, 2026
Security Bulletin ID
SB2026092441
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2026-96377)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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 the affected module does not sufficiently validate image style names when generating image derivatives. A remote attacker can generate image derivatives without a valid token and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.