CVE-2026-39243

Katalog CVE

CVSS 5.5 · Medium EPSS 0,30%

Kerentanan Improper Link Resolution Before File Access ('Link Following') pada decompress project decompress. Skor CVSS 3.1 5.5 (Medium) menurut CISA ADP.

Deskripsi (NVD)

decompress before 4.2.2 allows arbitrary hardlink creation during archive extraction, enabling file read disclosure and file corruption. When processing hardlink entries (type === 'link'), the x.linkname field from the archive is passed directly to fs.link() without validation (index.js line 113). An attacker can craft an archive with a hardlink entry whose linkname is an absolute path to any file on the same filesystem. This creates a hardlink inside the extraction directory that shares the same inode as the target file, enabling both reading and overwriting the original file's content. Hardlinks are limited to files on the same filesystem and cannot target directories.

Rincian

Terbit di NVD

9 Juli 2026

Terakhir diubah

13 Juli 2026

Status NVD

Analyzed

CVSS 3.1

5.5 (Medium), sumber CISA ADP
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-59: Improper Link Resolution Before File Access ('Link Following')

EPSS (30 hari)

0,30% peluang dieksploitasi; lebih tinggi dari 21,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/kevva/decompress/issues/113 exploit · advisory vendor
• https://github.com/kevva/decompress product
• https://www.npmjs.com/package/decompress product