CVE-2026-101005

medium

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.

References

https://www.cybersecurity-help.cz/vdb/vulns/149488/

https://vuldb.com/vuln/410875/cti

https://vuldb.com/vuln/410875

https://vuldb.com/submit/922294

https://vuldb.com/cve/CVE-2026-101005

https://github.com/octobercms/october/security/advisories/GHSA-j2j7-7m99-6226

https://github.com/octobercms/october/releases/tag/v4.3.5

https://github.com/0xGenesi/CVE/blob/main/October_CMS_SSRF_IPv6_Mapped_IPv4_Bypass.md

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-88093

Details

Source: Mitre, NVD

Published: 2026-09-28

Updated: 2026-09-28

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 7.3

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

Severity: High

CVSS v4

Base 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

Severity: Medium

EPSS

EPSS: 0.00298