pionxzh wakaru up to 1.3.x Filename Sanitization path traversal

Summaryinfo

A vulnerability, which was classified as critical, has been found in pionxzh wakaru up to 1.3.x. This impacts an unknown function of the component Filename Sanitization. The manipulation leads to path traversal. This vulnerability is traded as CVE-2026-54545. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in pionxzh wakaru up to 1.3.x and classified as critical. This issue affects an unknown functionality of the component Filename Sanitization. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-23. The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

wakaru is a JavaScript decompiler and unminifier toolkit. From 1.0.0 until 1.4.0, @wakaru/cli sanitizes bundle-controlled module filenames only once before writing extracted modules, so a crafted filename containing overlapping traversal sequences such as ....// collapses to ../ after sanitization and lets the final output path escape the selected output directory, allowing an attacker who can cause a user to run wakaru --unpack on a malicious bundle to write files outside that directory and, depending on the target path and environment, potentially achieve code execution. This issue is fixed in @wakaru/cli 1.4.0.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-54545 since 06/15/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 1.4.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-49869). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• pionxzh

Name

• wakaru

Version

• 1.0
• 1.1
• 1.2
• 1.3

Website

• Product: https://github.com/pionxzh/wakaru/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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