OCTOBER 9, 2026
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Case File

CVE-2026-100909

HIGH · CVSS 7.3 EPSS 0.30% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-28 · Last synced 2026-10-09

CyberRota Analysis

AI-Generated

The vulnerability affects OctoberCMS versions up to 4.1.19, 4.2.25, and 4.3.4, specifically in the getSourcePathForResize function within ResizeImages.php, allowing for server-side request forgery (SSRF) attacks that can be executed remotely. Organizations using these versions should prioritize upgrading to 4.3.5 or 4.4.0 to mitigate the risk, as the exploit is publicly available. Immediate action is essential for those managing web applications built on OctoberCMS to prevent potential unauthorized access and data exposure.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-100909
Severity
HIGH
CVSS
7.3
EPSS
0.30%
F5

Original NVD Description

A vulnerability was found in OctoberCMS up to 4.1.19/4.2.25/4.3.4. The impacted element is the function getSourcePathForResize of the file modules/system/classes/ResizeImages.php. The manipulation of the argument realSourcePath results in server-side request forgery. The attack may be performed from remote. The exploit has been made public and could be used. Upgrading to version 4.3.5 and 4.4.0 is sufficient to resolve this issue. The patch is identified as 0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58. The affected component should be upgraded.