CVE-2026-26339: Hyland Alfresco Transformation Service Argument Injection RCE

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-19 · updated 2026-07-14
Weakness: CWE-918

Description

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 products

Hyland Alfresco Transform Core: before 5.2.4 — fixed in 5.2.4
Hyland Alfresco Transform Service: before 4.2.3 — fixed in 4.2.3

How to fix

Upgrade to a fixed version: Hyland Alfresco Transform Core 5.2.4; Hyland Alfresco Transform Service 4.2.3. Check the vendor advisory for mitigations.

References

https://connect.hyland.com/t5/alfresco-blog/security-update-cve-2026-26337-cve-2026-26338-cve-2026-26339/ba-p/496551
https://www.hyland.com/en/solutions/products/alfresco-platform
https://www.vulncheck.com/advisories/hyland-alfresco-transformation-service-argument-injection-rce

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