@xhmikosr/decompress: Path traversal via symlink chain (CVE-2026-101894) | HOL Guard CVE

Critical · CVSS 9.1CVE-2026-101894

@xhmikosr/decompress: Path traversal via symlink chain

Answer in brief

CVE-2026-101894 records a Critical severity (CVSS 9.1) vulnerability in @xhmikosr/decompress: Path traversal via symlink chain. The current sources do not mark it as known exploited. The current feed maps XhmikosR/decompress (generic), kevva/decompress (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 28, 2026Updated Sep 28, 2026Source checked Sep 28, 2026First seen by HOL Sep 28, 2026Material review Sep 28, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.1
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps XhmikosR/decompress (generic), kevva/decompress (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
XhmikosR/decompressgeneric	<10.2.2 \|\| >=11.0.0 <11.1.4	10.2.2, 11.1.4
kevva/decompressgeneric	<=4.2.1	= 4.2.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for XhmikosR/decompress, kevva/decompress.
Review the reported fix. Update XhmikosR/decompress to 10.2.2; kevva/decompress to = 4.2.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 28, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.