CVE-2026-11470: hsweb-framework Path Traversal in File Upload Component

Technical summary

The vulnerability resides in the FileUploadProperties.java component's denied function within the hsweb-system-file module of hs-web hsweb-framework versions up to 5.0.1. The flaw is a classic path traversal issue (CWE-22) stemming from insufficient validation of the filename argument. An authenticated attacker can bypass directory restrictions by injecting path traversal sequences (such as ../ or absolute paths) into the filename parameter, enabling unauthorized file system access. The attack requires network access and valid authentication credentials but does not require user interaction.

Business impact

Organizations using affected hsweb-framework versions face risks of unauthorized file access, potential data exfiltration, or malicious file placement. Compromised user accounts could be leveraged to modify application files, tamper with data, or establish persistence mechanisms. The confidentiality and integrity impact is limited by the authentication requirement, but the scope of file system exposure warrants prompt remediation to prevent insider threats or lateral movement after credential compromise.

Affected systems

hs-web hsweb-framework versions up to and including 5.0.1 are vulnerable. Any deployment using this framework with file upload functionality is affected. Assess your application inventory to identify instances of this framework version and document which systems have exposed file upload endpoints that can be accessed by authenticated users.

Exploitability

Exploitation requires valid authentication credentials and network access to the file upload endpoint. The attack complexity is low—no special conditions or bypasses are needed once authenticated. Public disclosure and available attack details increase the practical exploitability risk, though the authentication barrier provides some protective friction. Organizations with strong access controls and monitoring of file upload activity may detect exploitation attempts.

Remediation

Install a patched version of hsweb-framework that addresses this vulnerability. The vendor has provided a fix identified by commit hash 8009845b577d8a2c4bbf4fdd8e8913799a714be6. Consult the official hsweb-framework release notes and advisory documentation to confirm the patched version number and upgrade path for your deployment model. Until patching is complete, restrict file upload functionality to trusted users and monitor upload activity for suspicious filename patterns.

Patch guidance

Obtain and deploy the patched version of hsweb-framework corresponding to commit 8009845b577d8a2c4bbf4fdd8e8913799a714be6 from the vendor's official repository. Test the patch in a non-production environment to ensure compatibility with your application configuration and dependent components. Prioritize patching systems where file upload endpoints are exposed to end users or less-trusted authenticated accounts. Verify the patch's integrity and authenticity through the vendor's official channels before deployment.

Detection guidance

Monitor file upload request logs for suspicious filename patterns, including path traversal sequences (../, .., absolute paths, or encoded variants such as %2e%2e). Alert on uploads where the filename argument contains directory separators or path traversal indicators. Enable file system access logging to detect unauthorized reads or writes outside designated upload directories. Review authentication logs for unusual access patterns to file upload endpoints, particularly from accounts that do not typically use these features.

Why prioritize this

Although marked MEDIUM severity due to authentication requirements, this vulnerability warrants prompt attention because public disclosure increases active exploitation likelihood, the attack is straightforward to execute with valid credentials, and the impact includes both confidential data exposure and system integrity compromise. Organizations with permissive internal access or shared accounts should treat this as higher priority.

Risk score, explained

The CVSS 3.1 score of 6.3 reflects a network-accessible vulnerability requiring low attack complexity and valid authentication (PR:L). Confidentiality, Integrity, and Availability impacts are each low (L), indicating the scope of file system exposure is constrained by the authentication requirement. The score accurately represents the threat level for typical deployments but may understate risk in environments with weak credential management or high-privilege authenticated user bases.

Frequently asked questions