Vulnerability record · CVE-2026-101005 · published 28 September 2026

CVE-2026-101005: Server-side request forgery (SSRF) vulnerability

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.

5.5 CVSS 4.0 Medium CWE-918 · Server-side request forgery (SSRF) Deferred

5.5CVSS 4.0 base score, v2 7.5

—EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

8References

28 Sep 2026Last modified by NVD

Description

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/0xGenesi/CVE/blob/main/October_CMS_SSRF_IPv6_Mapped_IPv4_Bypass.md
https://github.com/octobercms/october/releases/tag/v4.3.5
https://github.com/octobercms/october/security/advisories/GHSA-j2j7-7m99-6226
https://vuldb.com/cve/CVE-2026-101005
https://vuldb.com/submit/922294
https://vuldb.com/vuln/410875
https://vuldb.com/vuln/410875/cti
https://www.cybersecurity-help.cz/vdb/vulns/149488/

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-101005), CISA KEV, FIRST EPSS. This page is refreshed as NVD updates the record.