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TI-2026-21295 Aliases CVE-2026-26339GHSA-w8hr-79rx-368j

Hyland Alfresco Transformation Service Argument Injection RCE

Priority MEDIUM 49CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00632 50th percentileScored 2026-11-07
Fix Fixed Alfresco Transformation Service (Enterprise) (Hyland): 4.2.3Alfresco Community (Transform Core) (Hyland): 5.2.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
HylandAlfresco Transformation Service (Enterprise)before 4.2.34.2.3Patch availableCNA
HylandAlfresco Community (Transform Core)before 5.2.45.2.4Patch availableCNA
  • Alfresco Transformation Service (Enterprise) VendorHyland Affected before 4.2.3 Fixed in 4.2.3 Patch available CNA
  • Alfresco Community (Transform Core) VendorHyland Affected before 5.2.4 Fixed in 5.2.4 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:hyland:alfresco_transform_service:*:*:*:*:*:*:*:*before 4.2.3VulnerableHyland
cpe:2.3:a:hyland:alfresco_transform_core:*:*:*:*:*:*:*:*before 5.2.4VulnerableHyland
  • cpe:2.3:a:hyland:alfresco_transform_service:*:*:*:*:*:*:*:* Versions before 4.2.3 Vulnerable ·Hyland
  • cpe:2.3:a:hyland:alfresco_transform_core:*:*:*:*:*:*:*:* Versions before 5.2.4 Vulnerable ·Hyland

Remediation

  • Fix · CNA Alfresco Transformation Service (Enterprise) (Hyland) Fixed in 4.2.3
  • Fix · CNA Alfresco Community (Transform Core) (Hyland) Fixed in 5.2.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Hyland Alfresco Community (Transform Core), Alfresco Transformation Service (Enterprise) — connect.hyland.com/t5/alfresco-blog/security-update-cve-202…

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-21293 Hyland Alfresco Transformation Service Absolute Path Traversal Arbitrary File Read and SSRFPriority MEDIUM 44
    • TI-2026-21294 Hyland Alfresco Transformation Service SSRFPriority LOW 37
    Show all 3 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26339
  2. 2026-10-03 Alias added: GHSA-w8hr-79rx-368j
  3. 2026-10-25 EPSS moved to the below the 50th percentile
  4. 2026-10-26 EPSS moved to the 50th–90th percentile

References

Patch 1

Other 1

  • TI-2026-21293 Hyland Alfresco Transformation Service Absolute Path Traversal Arbitrary File Read and SSRF CVSS 4.0HIGH 8.8
  • TI-2026-21294 Hyland Alfresco Transformation Service SSRF CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences