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Critical · 9.1 Public exploit CVE-2026-101894 EUVD-2026-88365GHSA-hrh2-vp3x-79xf

@xhmikosr/decompress: Path traversal via symlink chain

Published Sep 28, 2026 · Updated Sep 28, 2026 · Assigned by GitHub_M

Description

The decompress package for Node.js extracts archives. Prior to 10.2.2 and 11.1.4, the default decompress(input, output) API relies on lexical containment checks that do not account for the kernel following a planted symlink chain. An attacker can supply a crafted archive containing chained symlink entries so that a later entry resolves outside the output directory. This allows files outside output to be read or written, and overwriting startup scripts or configuration can lead to remote code execution. The maintained @xhmikosr/decompress package is fixed in 10.2.2 and 11.1.4, but the separately affected unmaintained decompress package remains unpatched through 4.2.1. This vulnerability results from a bypass of the incomplete hardening for CVE-2026-53486. @xhmikosr/decompress is fixed in versions 10.2.2 and 11.1.4.

Affected products

VendorProductAffectedFixed
XhmikosR decompress < 10.2.2, >= 11.0.0, < 11.1.4 —
kevva decompress <= 4.2.1 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • murrez/CVE-2026-101894 ★ 1 · Sep 29, 2026

    CVE-2026-101894 PoC: @xhmikosr/decompress symlink-chain archive path traversal (bypass CVE-2026-53486). Node lab + lockfile scan + mass evil.tar upload exploit. CVSS 9.1. https://pocbit.org/pocs/cve-…

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Affected packages

EcosystemPackageAffectedFixedRecord
npm @xhmikosr/decompress >= 11.0.0, < 11.1.4 11.1.4 GHSA-hrh2-vp3x-79xf
npm @xhmikosr/decompress < 10.2.2 10.2.2 GHSA-hrh2-vp3x-79xf
npm decompress <= 4.2.1 — GHSA-hrh2-vp3x-79xf

References