What is CVE-2026-26339?

CVE-2026-26339 is a critical-severity vulnerability in Hyland Alfresco Community (Transform Core), classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2026-02-19.

How severe is CVE-2026-26339?

Critical severity. CVSS v3 base score is 9.8 out of 10.

SSRF in Hyland Alfresco Community (Transform Core)

CVE-2026-26339

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

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.005 (42.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Hyland Alfresco Community (Transform Core) — versions 0
Hyland Alfresco Transformation Service (Enterprise) — versions 0
Hyland Alfresco_transform_core
Hyland Alfresco_transform_service

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

disclosure@vulncheck.com (vendor-advisory, patch, Vendor Advisory)
disclosure@vulncheck.com (Product, product)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-26339?: CVE-2026-26339 is a critical-severity vulnerability in Hyland Alfresco Community (Transform Core), classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2026-02-19.
How severe is CVE-2026-26339?: Critical severity. CVSS v3 base score is 9.8 out of 10.