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CVE-2026-101894: decompress

Severity

9.1 (CRITICAL)

Vendor

XHMIKOSR

Affected versions

< 10.2.2; >= 11.0.0, < 11.1.4; <= 4.2.1

Fixed version

10.2.2

Patch status

Unpatched

Published

2026-09-28T17:17:48.830

Modified

2026-09-28T18:17:17.730

Why it matters

This matters because the affected product may allow code execution. Prioritize systems that are internet-facing or have privileged access to other infrastructure.

Recommended admin actions

• Prioritize validation immediately due to critical CVSS severity.
• Compare installed versions against the affected version range in the advisory.
• Treat internet-facing systems as higher priority.
• Review logs for suspicious activity related to the affected application or component.
• Apply compensating controls or temporarily remove exposure until a vendor fix is available.

Technical summary

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.

View the official NVD record for CVE-2026-101894

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.