Vulnerability · NVD published 2026-09-28
CVE-2026-101894
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.
Signals
- Exploited in the wild
- Not on KEVNot in CISA's catalogue as of the last daily pull. Absence is not proof of safety.
- EPSS · 30-day forecast
- 1%Chance of exploitation in the next 30 days, 56th percentile of all CVEs. A forecast; KEV outranks it.
- CVSS · NVD · CRITICAL
- 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Internet exposure
- not stated by sourcesNo exposure census on this CVE's dispatches.
Exploits
1 known · links onlyGitHub PoCs · by trust, then stars1
- murrez/CVE-2026-101894 ↗Trust ok 100
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-2026-101894
★ 0 · created 2026-09-29
Fake proof-of-concept repositories have been used to deliver malware to the researchers who run them. The trust verdict is our engine's heuristic over the repository (account age, what it ships, how its stars arrived); it is a reason to read the code first, not a finding about its author.
On the wire
1 dispatchWatch this one?
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