Server-Side Request Forgery in October CMS Affects Image Processing
CVE-2026-101005

6.9MEDIUM

Key Information:

Vendor

October CMS

Status
October Cms
Vendor
CVE Published:
28 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-101005?

A vulnerability in the October CMS up to version 4.3.4 exists in the validateExternalImageHost function, located in System/Classes/ResizeImages.php. This flaw allows attackers to exploit server-side request forgery (SSRF) vulnerabilities, potentially enabling remote access and manipulation of server requests. Users are recommended to upgrade to version 4.3.5 to effectively mitigate this security risk.

Affected Version(s)

October CMS 4.3.0

October CMS 4.3.1

October CMS 4.3.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-101005 - Proof of Concept

References

https://vuldb.com/vuln/410875
vdb-entrytechnical-description
https://vuldb.com/vuln/410875/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-101005
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

chenhuanlin (VulDB User)
.