CVE-2026-101005
High
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.
SeverityHigh
CVSS7.3
Exploit probability23. percentile0.3%
Product
October Cms
PublishedSep 28, 2026
First seenSep 28, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| october_cms october_cms | 4.3.0, 4.3.1, 4.3.2, 4.3.3, 4.3.4 | — |
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