Avaiga taipy up to 4.1.1 library.py ElementLibrary.get_resource path traversal

Summaryinfo

A vulnerability classified as critical has been found in Avaiga taipy up to 4.1.1. Affected is the function ElementLibrary.get_resource in the library taipy/gui/extension/library.py. The manipulation leads to path traversal. This vulnerability is referenced as CVE-2026-48544. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Avaiga taipy up to 4.1.1. This issue affects the function ElementLibrary.get_resource in the library taipy/gui/extension/library.py. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality. The summary by CVE is:

Taipy 4.1.1, fixed in commit 129fd40, contains a path traversal vulnerability in the ElementLibrary.get_resource() method in taipy/gui/extension/library.py that allows unauthenticated attackers to escape the intended module directory by exploiting an incomplete path containment check using str.startswith() without a trailing path separator. Attackers can send crafted GET requests with path traversal segments targeting a prefix-matching sibling directory on disk, bypassing the directory containment check because Flask's path converter and Werkzeug's WSGI layer preserve the traversal segments while the resolved path still satisfies the flawed startswith comparison, enabling unauthorized file access outside the intended library directory.

The weakness was published by Yu Sun as 2868. The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-48544 since 05/21/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 4.1.1 eliminates this vulnerability. Applying the patch 129fd407ffca49ee4ab853772c88d0c873e038dd is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• Avaiga

Name

• taipy

Version

• 4.1.0
• 4.1.1

License

• open-source

Website

• Product: https://github.com/Avaiga/taipy/

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