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CVE-2026-101005 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L

CNA: [email protected]CVSS-B:7.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/0xGenesi/CVE/blob/main/October_CMS_SSRF_IPv6_Mapped_IPv4_Bypass.md	[email protected]	ExploitTechnical Analysis
https://github.com/octobercms/october/releases/tag/v4.3.5	[email protected]	Release NotesVendor
https://github.com/octobercms/october/security/advisories/GHSA-j2j7-7m99-6226	[email protected]	AdvisoryRemedyVendor
https://vuldb.com/cve/CVE-2026-101005	[email protected]	AdvisoryPermission Required
https://vuldb.com/submit/922294	[email protected]	Issue TrackingPermission Required
https://vuldb.com/vuln/410875	[email protected]	AdvisoryPermission Required
https://vuldb.com/vuln/410875/cti	[email protected]	Content Wall
https://www.cybersecurity-help.cz/vdb/vulns/149488/	[email protected]	AdvisoryRemedy

see all 8 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-918	Server-Side Request Forgery (SSRF)	[email protected]

Affected Products

Product	Versions
October CMS	>= 4.3.0, < 4.3.4 (semver)
CPE cpe:2.3:a:octobercms:octobercms:::::::: Remediation Upgrade: 4.3.5moderate effort Workaround:moderate effort Audit template code and backend widget configuration for uses of the \|resize filter (or direct ResizeImages::resize() calls) that accept untrusted string input, and reject any host containing ::ffff: or :: before passing it in. Mitigation:moderate effort Block outbound traffic from the web tier to loopback, private, link-local, and 169.254.169.254 at the network layer.

Product

Versions

October CMS

>= 4.3.0, < 4.3.4 (semver)

CPE

cpe:2.3:a:octobercms:octobercms:*:*:*:*:*:*:*:*

Remediation

Upgrade: 4.3.5moderate effort
Workaround:moderate effort
Audit template code and backend widget configuration for uses of the |resize filter (or direct ResizeImages::resize() calls) that accept untrusted string input, and reject any host containing ::ffff: or :: before passing it in.
Mitigation:moderate effort
Block outbound traffic from the web tier to loopback, private, link-local, and 169.254.169.254 at the network layer.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 28, 2026	CVE Modified	CISA-ADP
Sep 28, 2026	New CVE Received	[email protected]