CVE-2026-39246

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/kevva/decompress	Product
https://github.com/kevva/decompress/issues/114	Exploit Vendor Advisory
https://www.npmjs.com/package/decompress	Product
https://github.com/kevva/decompress/issues/114	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:decompress_project:decompress:*:*:*:*:*:node.js:*:*

History

No history.

Information

Published : 2026-07-09 22:17

Updated : 2026-07-13 12:44

NVD link : CVE-2026-39246

Mitre link : CVE-2026-39246

CVE.ORG link : CVE-2026-39246

JSON object : View

Products Affected

decompress_project

decompress

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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