HKUDS DeepCode up to 1.2.0 Path Normalization new_ui/backend/main.py path traversal

Summaryinfo

A vulnerability labeled as critical has been found in HKUDS DeepCode up to 1.2.0. This affects an unknown part of the file new_ui/backend/main.py of the component Path Normalization Handler. The manipulation results in path traversal. This vulnerability is reported as CVE-2026-32847. The attack can be launched remotely. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in HKUDS DeepCode up to 1.2.0. Affected is an unknown part of the file new_ui/backend/main.py of the component Path Normalization Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. CVE summarizes:

DeepCode through commit c991dc2 contains a path traversal vulnerability in the SPA catch-all route in new_ui/backend/main.py that allows unauthenticated attackers to read arbitrary files by supplying percent-encoded path segments to the GET /{full_path:path} endpoint. Attackers can bypass Starlette's path normalization by encoding slashes as %2F and dots as %2E%2E, causing the joined path to traverse outside FRONTEND_DIST and exposing sensitive files such as SSH private keys, TLS certificates, and application secrets with a single HTTP request.

The weakness was disclosed by Yu Sun. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-32847 since 03/16/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Applying the patch c991dc22e67958a031f2e20595128a6a5fbd8f3d is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-33008). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• HKUDS

Name

• DeepCode

Version

• 1.0
• 1.1
• 1.2.0

Website

• Product: https://github.com/HKUDS/DeepCode/

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Once again VulDB remains the best source for vulnerability data.

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