CVE-2026-26338: Hyland Alfresco Transformation Service SSRF

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% 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 server-side request forgery (SSRF) through the document processing functionality.

Affected products

Hyland Alfresco Transform Core: before 5.3.0; 5.3.0-alpha1 — fixed in 5.3.0
Hyland Alfresco Transform Service: before 4.3 — fixed in 4.3

How to fix

Upgrade to a fixed version: Hyland Alfresco Transform Core 5.3.0; Hyland Alfresco Transform Service 4.3. 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-ssrf

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