CVE-2026-101005
October CMS SSRF Protection ResizeImages.php validateExternalImageHost server-side request forgery
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 28, 2026
- Updated
- Sep 28, 2026
- Reserved
- Sep 27, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 7.3 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C | VulDB |
| 3.0 | 7.3 High | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C | VulDB |
| 2.0 | 7.5 High | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
- CWE-918 Server-Side Request Forgery
Affected Products
| Product | Versions |
|---|---|
October CMSn/a |
|
References
- VDB-410875 | October CMS SSRF Protection ResizeImages.php validateExternalImageHost server-side request forgeryvdb-entrytechnical-description
- VDB-410875 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-101005 | CVE Analysis and Reportthird-party-advisory
- Submit #922294 | October CMS 4.3.4 (4.x branch, up to commit c1876c7) Server-Side Request Forgerythird-party-advisory
- https://github.com/octobercms/october/security/advisories/GHSA-j2j7-7m99-6226related
- https://github.com/0xGenesi/CVE/blob/main/October_CMS_SSRF_IPv6_Mapped_IPv4_Bypass.mdexploit
- https://github.com/octobercms/october/releases/tag/v4.3.5patch
- https://www.cybersecurity-help.cz/vdb/vulns/149488/related
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