What is the CVSS score of CVE-2026-26338?

CVE-2026-26338 has a CVSS 4.0 base score of 6.9 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2026-26338?

Within 24 hours: Identify all systems running Alfresco Transformation Service and isolate them from production networks if possible; notify stakeholders and activate incident response procedures. Within 7 days: Deploy network-level controls (WAF rules blocking suspicious document processing requests, restrict outbound connections from the service); disable document transformation functionality if operationally feasible; implement enhanced monitoring for unusual SSRF patterns. Within 30 days: Evaluate alternative solutions or upgrade to patched versions when available; conduct forensic analysis for evidence of exploitation; implement zero-trust network access controls around the service.

Alfresco Transform Core CVE-2026-26338

MEDIUM

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

2026-02-19 disclosure@vulncheck.com

SSRF Alfresco Transform Core Alfresco Transform Service Hyland

6.9

CVSS 4.0 · Vendor: vulncheck

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Send crafted document to Transformation Service
Exploit

Inject malicious URL in processing request
Execution

Service fetches internal resource
Impact

Attacker exfiltrates sensitive data or pivots internally

Vulnerability Assessment

Weakness	CWE CWE-918 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V4 - API and Web Service URL allowlisting, SSRF prevention MITRE ATT&CK 2 techniques across 2 tactics: Initial Access, Credential Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	No special conditions — remote unauthenticated exploitation against default Hyland Alfresco Transformation Service configurations with document processing enabled.
Impact	CVSS 9.8.
Exploit ScenarioDerived	Document transformation accesses internal services.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

SSRF in Hyland Alfresco Transformation Service via document processing.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:03 CVSS 9.8

SSRF in Alfresco document transformation.

RemediationAI

Apply vendor patch.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-918 in document processing pipeline.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (vulncheck) PRIMARY 6.9 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (vulncheck) · only source for this CVE.

CVSS VectorVendor: vulncheck

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

Low

Vulnerable system: Integrity

Low

Vulnerable system: Availability

None

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

Severity Changed

Jul 14, 2026 - 16:22 NVD

CRITICAL MEDIUM

CVSS changed

Jul 14, 2026 - 16:22 NVD

9.8 (CRITICAL) 6.9 (MEDIUM)

CVE Published

Feb 19, 2026 - 18:24 nvd

CRITICAL 9.8

DescriptionCVE.org

Hyland Alfresco Transformation Service allows unauthenticated attackers to achieve server-side request forgery (SSRF) through the document processing functionality.

Executive ViewAI

Why It Matters

A critical vulnerability in Hyland Alfresco Transformation Service allows unauthenticated attackers to bypass security controls and access internal systems through server-side request forgery. Any organization running this service is at immediate risk of data exfiltration, lateral movement, and potential compromise of connected infrastructure. This requires urgent remediation as no vendor patch is currently available.

Business Impact: Severe

Compensating Controls

Implement WAF rules to detect and block SSRF payloads in document processing requests; isolate Transformation Service on a restricted network segment with egress filtering; disable external URL processing in transformation settings; restrict service account permissions to minimum required; deploy network-based IDS/IPS signatures targeting SSRF exploitation; require VPN/authentication for all service access; monitor and log all outbound connections from the service; consider temporary service shutdown if not critical to operations.

Threat Intelligence Overview

EPSS Score

0.1%

Top 78% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.