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CVE-2026-100909

HIGHCVSS 7.3/10

Last modified

CVE-2026-100909 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. 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.

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.

Metrics

CVSS 3.1
7.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS 4.0
5.5/10

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:X/V:X/RE:X/U:X

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
—OctoberCMS4.1.0; 4.1.1; 4.1.2; 4.1.3; 4.1.4; 4.1.5; 4.1.6; 4.1.7; 4.1.8; 4.1.9; 4.1.10; 4.1.11; 4.1.12; 4.1.13; 4.1.14; 4.1.15; 4.1.16; 4.1.17; 4.1.18; 4.1.19; 4.2.0; 4.2.1; 4.2.2; 4.2.3; 4.2.4; 4.2.5; 4.2.6; 4.2.7; 4.2.8; 4.2.9; 4.2.10; 4.2.11; 4.2.12; 4.2.13; 4.2.14; 4.2.15; 4.2.16; 4.2.17; 4.2.18; 4.2.19; 4.2.20; 4.2.21; 4.2.22; 4.2.23; 4.2.24; 4.2.25; 4.3.0; 4.3.1; 4.3.2; 4.3.3; 4.3.4

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2026-100909?
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.
How severe is CVE-2026-100909?
CVE-2026-100909 has a CVSS score of 7.3/10 (HIGH severity).
How do I fix CVE-2026-100909?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST