CVE-2026-100909

OctoberCMS ResizeImages.php getSourcePathForResize server-side request forgery

Published Sep 28, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

OctoberCMS

affected

Version	Status	Constraints
`4.1.0`	affected	—
`4.1.1`	affected	—
`4.1.2`	affected	—
`4.1.3`	affected	—
`4.1.4`	affected	—
`4.1.5`	affected	—
`4.1.6`	affected	—
`4.1.7`	affected	—
`4.1.8`	affected	—
`4.1.9`	affected	—
`4.1.10`	affected	—
`4.1.11`	affected	—
`4.1.12`	affected	—
`4.1.13`	affected	—
`4.1.14`	affected	—
`4.1.15`	affected	—
`4.1.16`	affected	—
`4.1.17`	affected	—
`4.1.18`	affected	—
`4.1.19`	affected	—
`4.2.0`	affected	—
`4.2.1`	affected	—
`4.2.2`	affected	—
`4.2.3`	affected	—
`4.2.4`	affected	—
`4.2.5`	affected	—
`4.2.6`	affected	—
`4.2.7`	affected	—
`4.2.8`	affected	—
`4.2.9`	affected	—
`4.2.10`	affected	—
`4.2.11`	affected	—
`4.2.12`	affected	—
`4.2.13`	affected	—
`4.2.14`	affected	—
`4.2.15`	affected	—
`4.2.16`	affected	—
`4.2.17`	affected	—
`4.2.18`	affected	—
`4.2.19`	affected	—
`4.2.20`	affected	—
`4.2.21`	affected	—
`4.2.22`	affected	—
`4.2.23`	affected	—
`4.2.24`	affected	—
`4.2.25`	affected	—
`4.3.0`	affected	—
`4.3.1`	affected	—
`4.3.2`	affected	—
`4.3.3`	affected	—
`4.3.4`	affected	—
`4.3.5`	unaffected	—
`4.4.0`	unaffected	—

No data.

Vendor Product Versions

Octobercms

Version	Status	Scheme	Platform
`4.1.0`	affected	semver	—
`4.1.1`	affected	semver	—
`4.1.2`	affected	semver	—
`4.1.3`	affected	semver	—
`4.1.4`	affected	semver	—
`4.1.5`	affected	semver	—
`4.1.6`	affected	semver	—
`4.1.7`	affected	semver	—
`4.1.8`	affected	semver	—
`4.1.9`	affected	semver	—
`4.1.10`	affected	semver	—
`4.1.11`	affected	semver	—
`4.1.12`	affected	semver	—
`4.1.13`	affected	semver	—
`4.1.14`	affected	semver	—
`4.1.15`	affected	semver	—
`4.1.16`	affected	semver	—
`4.1.17`	affected	semver	—
`4.1.18`	affected	semver	—
`4.1.19`	affected	semver	—
`4.2.0`	affected	semver	—
`4.2.1`	affected	semver	—
`4.2.2`	affected	semver	—
`4.2.3`	affected	semver	—
`4.2.4`	affected	semver	—
`4.2.5`	affected	semver	—
`4.2.6`	affected	semver	—
`4.2.7`	affected	semver	—
`4.2.8`	affected	semver	—
`4.2.9`	affected	semver	—
`4.2.10`	affected	semver	—
`4.2.11`	affected	semver	—
`4.2.12`	affected	semver	—
`4.2.13`	affected	semver	—
`4.2.14`	affected	semver	—
`4.2.15`	affected	semver	—
`4.2.16`	affected	semver	—
`4.2.17`	affected	semver	—
`4.2.18`	affected	semver	—
`4.2.19`	affected	semver	—
`4.2.20`	affected	semver	—
`4.2.21`	affected	semver	—
`4.2.22`	affected	semver	—
`4.2.23`	affected	semver	—
`4.2.24`	affected	semver	—
`4.2.25`	affected	semver	—
`4.3.0`	affected	semver	—
`4.3.1`	affected	semver	—
`4.3.2`	affected	semver	—
`4.3.3`	affected	semver	—
`4.3.4`	affected	semver	—
`4.3.5`	unaffected	semver	—
`4.4.0`	unaffected	semver	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.298% probability within 30 days)

Exploitation poc

Automatable yes

Technical Impact partial

References

Link	Providers
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

History

Sep 28, 2026 1:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 28, 2026 4:45 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		OctoberCMS ResizeImages.php getSourcePathForResize server-side request forgery
First Time appeared		Octobercms Octobercms octobercms
Weaknesses		CWE-918
CPEs		cpe:2.3:a:octobercms:octobercms::::::::
Vendors & Products		Octobercms Octobercms octobercms
References		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
Metrics		cvssV2_0 `{'score': 7.5, 'vector': 'AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C'}` cvssV3_0 `{'score': 7.3, 'vector': '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'}` cvssV3_1 `{'score': 7.3, 'vector': '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'}` cvssV4_0 `{'score': 6.9, 'vector': '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'}`