All vulnerabilities
CVE-2026-101005GHSA-j2j7-7m99-6226

October CMS SSRF Protection ResizeImages.php validateExternalImageHost server-side request forgery

n/a October CMS
Open in ThreatlineRecord JSON
CVSS
6.9Medium
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 28 Sep 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.30%Chance of exploitation activity in the next 30 days, higher than 21% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published28 Sep 2026Updated 28 Sep 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

A vulnerability was detected in October CMS up to 4.3.4. This affects the function validateExternalImageHost of the file System/Classes/ResizeImages.php of the component SSRF Protection. The manipulation results in server-side request forgery. The attack may be launched remotely. The exploit is now public and may be used. Upgrading to version 4.3.5 is able to mitigate this issue. You should upgrade the affected component.

Text from CVE List

Affected versions 6

  • October CMSaffected: 4.3.0CVE List
  • October CMSaffected: 4.3.1CVE List
  • October CMSaffected: 4.3.2CVE List
  • October CMSaffected: 4.3.3CVE List
  • October CMSaffected: 4.3.4CVE List
  • October CMSunaffected: 4.3.5CVE List

References 8