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Vulnerability record · CVE-2026-100909 · published 28 September 2026

CVE-2026-100909: Server-side request forgery (SSRF) vulnerability

A vulnerability was found in OctoberCMS up to 4.1.19/4.2.25/4.3.4. The impacted element is the function getSourcePathForResize of the file modules/system/classes/ResizeImages.php. The manipulation of the argument realSourcePath results in server-side request forgery. The attack may be performed from remote. The exploit has been made public and could be used. Upgrading to version 4.3.5 and 4.4.0 is sufficient to resolve this issue. The patch is identified as 0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58. The affected component should be upgraded.

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

A vulnerability was found in OctoberCMS up to 4.1.19/4.2.25/4.3.4. The impacted element is the function getSourcePathForResize of the file modules/system/classes/ResizeImages.php. The manipulation of the argument realSourcePath results in server-side request forgery. The attack may be performed from remote. The exploit has been made public and could be used. Upgrading to version 4.3.5 and 4.4.0 is sufficient to resolve this issue. The patch is identified as 0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58. The affected component should be upgraded.

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

LinkTags
https://github.com/0xGenesi/CVE/blob/main/October_CMS_Stream_Wrapper_Injection.md
https://github.com/octobercms/october/commit/0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58
https://github.com/octobercms/october/releases/tag/v4.3.5
https://github.com/octobercms/october/security/advisories/GHSA-2xmm-m4wv-3fjh
https://vuldb.com/cve/CVE-2026-100909
https://vuldb.com/submit/919993
https://vuldb.com/vuln/410869
https://vuldb.com/vuln/410869/cti

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Source: NIST National Vulnerability Database (record CVE-2026-100909), CISA KEV, FIRST EPSS. This page is refreshed as NVD updates the record.