CVEvulnerability

CVE-2026-39246

7.5 HIGH Published 2026-07-09 Modified 2026-07-13 Official page ↗
Status
Analyzed
Published
2026-07-09
Last modified
2026-07-13
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weaknesses
CWE-59

Description

decompress before 4.2.2 allows arbitrary symlink creation during archive extraction. When processing symlink entries (type === 'symlink'), the x.linkname field from the archive is passed directly to fs.symlink() without validation (index.js line 121). The preventWritingThroughSymlink check on line 98 only applies to file entries, not symlink creation. An attacker can craft an archive with symlink entries pointing to sensitive files outside the extraction directory (e.g., /etc/passwd), enabling information disclosure when the application reads the extracted contents.

Affected configurations

• decompress project decompress (<= 4.2.1)

Related

Weakness · CWE (1)

  • CWE-59 Improper Link Resolution Before File Access weakness

References