@wakaru/cli arbitrary file write during bundle unpack
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| pionxzh | wakaru | 1.0.0 to before 1.4.0 | 1.4.0 | Patch available | CNA |
| — | @wakaru/cli (npm) | 1.0.0 to before 1.4.0 | 1.4.0 | Patch available | GHSA-7wpj-vvmv-pgm8 |
- wakaru Vendorpionxzh Affected 1.0.0 to before 1.4.0 Fixed in 1.4.0 Patch available CNA
- @wakaru/cli (npm) Vendor— Affected 1.0.0 to before 1.4.0 Fixed in 1.4.0 Patch available GHSA-7wpj-vvmv-pgm8
Remediation
- Fix · CNA wakaru (pionxzh) Fixed in 1.4.0
- Fix · GHSA-7wpj-vvmv-pgm8 @wakaru/cli (npm) Fixed in 1.4.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-54545
- 2026-10-03 Alias added: GHSA-7wpj-vvmv-pgm8
References
Sources
- CVE-2026-54545 · CVE Program
- CVE-2026-54545 · NVD
- FIRST EPSS
- GHSA-7wpj-vvmv-pgm8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences