Review reviewCritical

CVE-2026-26339

Hyland Alfresco Transformation Service (Enterprise), Alfresco Community (Transform Core), alfresco transform service

Hyland Alfresco Transformation Service allows unauthenticated attackers to achieve remote code execution through the argument injection vulnerability, which exists in the document processing functionality.

CVSS
9.3
EPSS
0.54%
42.6% percentile
CISA KEV
Not listed
Published
2026.02.20
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.54%
Technical severityCVSS 9.3

Vulnerability overview

Hyland Alfresco Transformation Service allows unauthenticated attackers to achieve remote code execution through the argument injection vulnerability, which exists in the document processing functionality.

Affected product and versions

Product
Hyland Alfresco Transformation Service (Enterprise), Alfresco Community (Transform Core), alfresco transform service
Affected versions
< 4.2.3, < 5.2.4
Fixed versions
4.2.3, 5.2.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Hyland Alfresco Transformation Service (Enterprise), Alfresco Community (Transform Core), alfresco transform service and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
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
CWE
CWE-918