EUVD-2026-49869
GHSA-7wpj-vvmv-pgm8
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Primary rating from Vendor (https://github.com/pionxzh/wakaru) · only source for this CVE.
CVSS VectorVendor: https://github.com/pionxzh/wakaru
Lifecycle Timeline
3DescriptionCVE.org
Impact
@wakaru/cli is vulnerable to arbitrary file write when unpacking a crafted JavaScript bundle with --unpack.
Bundle-controlled module filenames were sanitized before writing extracted modules to the output directory. A crafted filename containing overlapping path traversal characters, such as ....//, could be transformed into ../ after sanitization. This allowed the final output path to escape the intended output directory.
An attacker who can cause a user to run wakaru --unpack on a malicious bundle may be able to write files outside the selected output directory. Depending on the target path and user environment, this may lead to code execution.
Affected versions: >=1.0.0 <1.4.0.
Patches
The issue has been patched in @wakaru/cli@1.4.0.
Users should upgrade to:
npm install @wakaru/cli@latestor specifically:
npm install @wakaru/cli@1.4.0Workarounds
Do not run wakaru --unpack on untrusted or unknown bundles with affected versions.
If upgrading immediately is not possible, avoid using `--unpack on files that may be attacker-controlled.
Articles & Coverage 2
AnalysisAI
Arbitrary file write in @wakaru/cli versions 1.0.0 to 1.3.x allows attackers who can trick a user into running wakaru --unpack on a crafted bundle to write files outside the intended output directory. The flaw stems from incomplete sanitization of bundle-controlled filenames containing overlapping path traversal sequences like ....//, which after sanitization become ../. Successful exploitation can lead to code execution if an overwritten file is executed later.
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External POC / Exploit Code
Leaving vuln.today