What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-28 · updated 2026-10-24
• Weakness: CWE-22

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 products

• pionxzh wakaru: from 1.0.0, < 1.4.0

References

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

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