CVE-2026-100909

OctoberCMS ResizeImages.php getSourcePathForResize 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 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.

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
OctoberCMSn/a	4.1.0Affected 4.1.1Affected 4.1.2Affected 4.1.3Affected 4.1.4Affected 4.1.5Affected 4.1.6Affected 4.1.7Affected 4.1.8Affected 4.1.9Affected 4.1.10Affected 4.1.11Affected 4.1.12Affected 4.1.13Affected 4.1.14Affected 4.1.15Affected 4.1.16Affected 4.1.17Affected 4.1.18Affected 4.1.19Affected 4.2.0Affected 4.2.1Affected 4.2.2Affected 4.2.3Affected 4.2.4Affected and 28 more versions

References

VDB-410869 | OctoberCMS ResizeImages.php getSourcePathForResize server-side request forgeryvdb-entrytechnical-description
VDB-410869 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2026-100909 | CVE Analysis and Reportthird-party-advisory
Submit #919993 | octobercms October CMS <= 4.3.4 Path Traversalthird-party-advisory
https://github.com/octobercms/october/security/advisories/GHSA-2xmm-m4wv-3fjhrelated
https://github.com/0xGenesi/CVE/blob/main/October_CMS_Stream_Wrapper_Injection.mdexploit
https://github.com/octobercms/october/commit/0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58patch
https://github.com/octobercms/october/releases/tag/v4.3.5patch

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