CVE-2026-26339 Hyland CVE debrief

Who should care

Organizations using Hyland Alfresco Transformation Service should prioritize patching this vulnerability to prevent potential remote code execution attacks. Security teams and vulnerability management teams should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance.

Technical summary

The vulnerability exists in the document processing functionality of Hyland Alfresco Transformation Service, allowing unauthenticated attackers to achieve remote code execution through argument injection. The CVSS vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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. Affected product deployments should be identified and patched or mitigated as soon as possible.

Defensive priority

High

Recommended defensive actions

• Apply patches or updates provided by Hyland to vulnerable versions of Alfresco Transformation Service
• Restrict access to the document processing functionality to authenticated users only
• Monitor for suspicious activity related to the Alfresco Transformation Service
• Consider implementing compensating controls, such as web application firewalls or intrusion detection systems
• Review and update asset inventory to ensure accurate tracking of affected systems
• Plan and schedule remediation through normal change control processes
• Verify and document evidence of remediation for affected assets

Evidence notes

The CVE record was published on 2026-02-19T18:25:00.133Z and was last modified on 2026-07-14T19:16:51.760Z. The NVD entry is currently Analyzed. Evidence is limited to public sources and may not reflect the full scope or impact of the vulnerability. Defenders should verify affected deployments and review official advisories for specific guidance.

Official resources