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CVE-2026-26339

Hyland Alfresco Transform Core remote code execution

9.8 CRITICALEPSS 1.05%
  1. Published19 Feb 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Hyland Alfresco Transform Core< 5.2.4
Hyland Alfresco Transform Service< 4.2.3

Remediation

Fixed in
Hyland Alfresco Transform Core≥ 5.2.4
Hyland Alfresco Transform Service≥ 4.2.3

References

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Frequently asked

Is CVE-2026-26339 being actively exploited?

CVE-2026-26339 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.05%.

How severe is CVE-2026-26339?

CVE-2026-26339 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.05% probability of exploitation.

Which products are affected by CVE-2026-26339?

Affected products include Hyland Alfresco Transform Core, Hyland Alfresco Transform Service.

How do I fix CVE-2026-26339?

Upgrade affected software to a fixed version, for example Hyland Alfresco Transform Core 5.2.4, Hyland Alfresco Transform Service 4.2.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.