CVE-2026-26337

8.2

Hyland · Alfresco Transformation Service

Hyland Alfresco Transformation Service is vulnerable to an absolute path traversal flaw, allowing unauthenticated attackers to perform arbitrary file reads and server-side request forgery.

Executive summary

An unauthenticated absolute path traversal vulnerability in the Hyland Alfresco Transformation Service poses a significant risk of unauthorized data disclosure and internal network exploitation.

Vulnerability

The application is susceptible to absolute path traversal (CWE-36), which allows an unauthenticated attacker to manipulate file paths to read arbitrary files from the server and trigger server-side request forgery (SSRF) attacks.

Business impact

Successful exploitation permits unauthorized access to sensitive system files, which may lead to the exposure of credentials, configuration data, or proprietary information. Furthermore, the SSRF capability enables attackers to interact with internal services that are otherwise protected from the public internet, potentially facilitating lateral movement. Given the high CVSS score of 8.2, this vulnerability represents a significant threat to organizational confidentiality and infrastructure integrity.

Remediation

Immediate Action: Update Hyland Alfresco Transformation Service to version 4.3.0 (Enterprise) or 5.3.0 (Community) or later as specified in the official vendor security advisory.

Proactive Monitoring: Review web server and application logs for unusual request patterns, specifically those containing directory traversal sequences or requests targeting internal network resources.

Compensating Controls: Deploy a Web Application Firewall (WAF) with rules configured to inspect and block incoming requests containing absolute path traversal patterns or suspicious URI structures.

Exploitation status

Public Exploit Available: No (exploit_available: false)

Analyst recommendation

This vulnerability is critical due to the lack of required authentication and the potential for severe data leakage. Security teams should prioritize patching affected systems immediately. If an immediate update is not feasible, restrict network access to the Transformation Service to trusted internal segments only until the patch is applied.

More Hyland CVEs

Sources

Originally found and disclosed by Piotr Bazydlo (@chudyPB) of watchTowr, per the CVE Program record.