GHSA-7WPJ-VVMV-PGM8
Vulnerability from github – Published: 2026-07-28 14:44 – Updated: 2026-07-28 14:44Impact
@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@latest
or specifically:
npm install @wakaru/cli@1.4.0
Workarounds
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.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "@wakaru/cli"
},
"ranges": [
{
"events": [
{
"introduced": "1.0.0"
},
{
"fixed": "1.4.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-54545"
],
"database_specific": {
"cwe_ids": [
"CWE-22"
],
"github_reviewed": true,
"github_reviewed_at": "2026-07-28T14:44:01Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "### Impact\n\n`@wakaru/cli` is vulnerable to arbitrary file write when unpacking a crafted JavaScript bundle with `--unpack`.\n\nBundle-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.\n\nAn 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.\n\nAffected versions: `\u003e=1.0.0 \u003c1.4.0`.\n\n### Patches\n\nThe issue has been patched in `@wakaru/cli@1.4.0`.\n\nUsers should upgrade to:\n\n```sh\nnpm install @wakaru/cli@latest\n```\n\nor specifically:\n```\nnpm install @wakaru/cli@1.4.0\n```\n\n### Workarounds\n\nDo not run `wakaru --unpack` on untrusted or unknown bundles with affected versions.\n\nIf upgrading immediately is not possible, avoid using `--unpack on files that may be attacker-controlled.",
"id": "GHSA-7wpj-vvmv-pgm8",
"modified": "2026-07-28T14:44:02Z",
"published": "2026-07-28T14:44:01Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/pionxzh/wakaru/security/advisories/GHSA-7wpj-vvmv-pgm8"
},
{
"type": "WEB",
"url": "https://github.com/pionxzh/wakaru/commit/1d30383b20a6f768786b8ada2f1b0945de13c316"
},
{
"type": "PACKAGE",
"url": "https://github.com/pionxzh/wakaru"
},
{
"type": "WEB",
"url": "https://github.com/pionxzh/wakaru/releases/tag/v1.4.0"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "@wakaru/cli arbitrary file write during bundle unpack"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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