Vulnerability · Published Jul 28, 2026 · Assigned by GitHub_M

CVE-2026-54545@wakaru/cli arbitrary file write during bundle unpack

High 7.1

In plain English

A high-severity path traversal in wakaru from pionxzh. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.2%top 90.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@wakaru/cli	1.4.0	GHSA-7wpj-vvmv-pgm8

Affected products (as reported)

Vendor	Product	Versions
pionxzh	wakaru	>= 1.0.0, < 1.4.0

Weakness: CWE-22 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

References

https://github.com/pionxzh/wakaru/security/advisories/GHSA-7wpj-vvmv-pgm8 x_refsource_CONFIRM
https://github.com/pionxzh/wakaru/commit/1d30383b20a6f768786b8ada2f1b0945de13c316 x_refsource_MISC
https://github.com/pionxzh/wakaru/releases/tag/v1.4.0 x_refsource_MISC