Symlink Attack Affecting decompress package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JS-DECOMPRESS-17937340
- published10 Jul 2026
- disclosed10 Jul 2026
- creditDaniel Pua
Introduced: 10 Jul 2026
NewCVE-2026-39243 (opens in a new tab)How to fix?
There is no fixed version for decompress.
Overview
decompress is a package that can be used for extracting archives.
Affected versions of this package are vulnerable to Symlink Attack via the fs.link process. An attacker can gain unauthorized access to sensitive files or corrupt file contents by crafting an archive containing a hardlink entry with a linkname field set to an absolute path on the same filesystem. This allows the creation of a hardlink in the extraction directory that points to any file on the same filesystem, enabling both reading and overwriting of the original file's content. This is only exploitable if the attacker is able to supply a crafted archive and the extraction occurs on the same filesystem as the target file.