Vulnerability-Lookup

CVE-2026-54545 (GCVE-0-2026-54545)

Vulnerability from cvelistv5 – Published: 2026-07-28 14:43 – Updated: 2026-07-28 16:09

Title

@wakaru/cli arbitrary file write during bundle unpack

Summary

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.

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-28 16:09 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M mitre root Scorecard

References

3 references

URL	Tags
https://github.com/pionxzh/wakaru/security/adviso…	x_refsource_CONFIRM
https://github.com/pionxzh/wakaru/commit/1d30383b…	x_refsource_MISC
https://github.com/pionxzh/wakaru/releases/tag/v1.4.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
pionxzh	wakaru	Affected: >= 1.0.0, < 1.4.0

Show details on NVD website

JSON

To clipboard

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EUVD-2026-342124

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:55

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

JSON

To clipboard

{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:55:11.016121+00:00",
  "id": "EUVD-2026-342124"
}

FKIE_CVE-2026-54545

Vulnerability from fkie_nvd - Published: 2026-07-28 16:18 - Updated: 2026-07-30 19:16

Severity

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Summary

References

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

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "wakaru",
          "vendor": "pionxzh",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.0.0, \u003c 1.4.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
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    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-54545",
  "lastModified": "2026-07-30T19:16:52.210",
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          "attackVector": "LOCAL",
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          "baseScore": 7.1,
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          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
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        "type": "Secondary"
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GHSA-7WPJ-VVMV-PGM8

Vulnerability from github – Published: 2026-07-28 14:44 – Updated: 2026-07-28 14:44

Summary

@wakaru/cli arbitrary file write during bundle unpack

Details

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@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.

Severity

7.1 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-54545 (GCVE-0-2026-54545)

EUVD-2026-342124

FKIE_CVE-2026-54545

GHSA-7WPJ-VVMV-PGM8

Impact

Patches

Workarounds

Tags

Sightings

Nomenclature

Related by attack behaviour