Which versions of Alfresco Transform Core are affected by CVE-2026-26338?

A critical vulnerability in Hyland Alfresco Transformation Service allows unauthenticated attackers to bypass security controls and access internal systems through server-side request forgery.

How to fix or mitigate CVE-2026-26338?

Within 24 hours: Identify all systems running Alfresco Transformation Service and isolate them from production networks if possible; notify stakeholders and activate incident response procedures. Within 7 days: Deploy network-level controls (WAF rules blocking suspicious document processing requests, restrict outbound connections from the service); disable document transformation functionality if operationally feasible; implement enhanced monitoring for unusual SSRF patterns. Within 30 days: Evaluate alternative solutions or upgrade to patched versions when available; conduct forensic analysis for evidence of exploitation; implement zero-trust network access controls around the service.

Alfresco Transform Core CVE-2026-26338

Q: What is the CVSS score of CVE-2026-26338?

CVE-2026-26338 has a CVSS 4.0 base score of 6.9 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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. EPSS exploitation probability: 0.1%.

MEDIUM

Server-Side Request Forgery (SSRF) (CWE-918)

2026-02-19 disclosure@vulncheck.com

SSRF Alfresco Transform Core Alfresco Transform Service

6.9

CVSS 4.0 · Vendor: vulncheck

Severity by source

Vendor (vulncheck) PRIMARY

6.9 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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

Primary rating from Vendor (vulncheck) · only source for this CVE.

CVSS VectorVendor: vulncheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Jul 14, 2026 - 16:22 NVD

CRITICAL MEDIUM

CVSS changed

Jul 14, 2026 - 16:22 NVD

9.8 (CRITICAL) 6.9 (MEDIUM)

Analysis Generated

Mar 12, 2026 - 22:03 vuln.today

CVE Published

Feb 19, 2026 - 18:24 nvd

CRITICAL 9.8

DescriptionCVE.org

Hyland Alfresco Transformation Service allows unauthenticated attackers to achieve server-side request forgery (SSRF) through the document processing functionality.