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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 8
https://github.com/0xGenesi/CVE/blob/main/October_CMS_SSRF_IPv6_Mapped_IPv4_Byp…
cna@vuldb.com
https://github.com/octobercms/october/releases/tag/v4.3.5
cna@vuldb.com
https://github.com/octobercms/october/security/advisories/GHSA-j2j7-7m99-6226
cna@vuldb.com
https://vuldb.com/cve/CVE-2026-101005
cna@vuldb.com
https://vuldb.com/submit/922294
cna@vuldb.com
https://vuldb.com/vuln/410875
cna@vuldb.com
https://vuldb.com/vuln/410875/cti
cna@vuldb.com
https://www.cybersecurity-help.cz/vdb/vulns/149488/
cna@vuldb.com