@xhmikosr/decompress: Path traversal via symlink chain
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| XhmikosR | decompress | before 10.2.2; 11.0.0 to before 11.1.4 | 10.2.2, 11.1.4 | Patch available | CNA |
| kevva | decompress | up to 4.2.1 | — | No fix listed | CNA |
| — | @xhmikosr/decompress (npm) | 11.0.0 to before 11.1.4 | 11.1.4 | Patch available | GHSA-hrh2-vp3x-79xf |
| — | @xhmikosr/decompress (npm) | before 10.2.2 | 10.2.2 | Patch available | GHSA-hrh2-vp3x-79xf |
| — | decompress (npm) | up to 4.2.1 | — | No fix listed | GHSA-hrh2-vp3x-79xf |
- decompress VendorXhmikosR Affected before 10.2.2; 11.0.0 to before 11.1.4 Fixed in 10.2.2, 11.1.4 Patch available CNA
- decompress Vendorkevva Affected up to 4.2.1 Fixed in — No fix listed CNA
- @xhmikosr/decompress (npm) Vendor— Affected 11.0.0 to before 11.1.4 Fixed in 11.1.4 Patch available GHSA-hrh2-vp3x-79xf
- @xhmikosr/decompress (npm) Vendor— Affected before 10.2.2 Fixed in 10.2.2 Patch available GHSA-hrh2-vp3x-79xf
- decompress (npm) Vendor— Affected up to 4.2.1 Fixed in — No fix listed GHSA-hrh2-vp3x-79xf
Remediation
- Fix · CNA decompress (XhmikosR) Fixed in 10.2.2, 11.1.4
- Fix · GHSA-hrh2-vp3x-79xf @xhmikosr/decompress (npm) Fixed in 11.1.4 Advisory →
- Fix · GHSA-hrh2-vp3x-79xf @xhmikosr/decompress (npm) Fixed in 10.2.2 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 1 product
- Migration Toolkit for Applications 8
Timeline
- 2026-10-02 Threatist record created from CVE-2026-101894
- 2026-10-03 Alias added: GHSA-hrh2-vp3x-79xf
- 2026-10-09 Affected versions changed · Red Hat
- 2026-10-09 CVSS score added · Red Hat
References
Other 6
- https://github.com/XhmikosR/decompress/security/advisories/GHSA-hrh2-vp3x-79xf
- https://github.com/XhmikosR/decompress/commit/5f4b2f64abb31bbaf1fef8975b595fd7df2558d8
- https://github.com/XhmikosR/decompress/commit/f6c88c668216d6a12c6cecf4fe0b6c70bf77050a
- https://github.com/XhmikosR/decompress/releases/tag/v10.2.2
- https://github.com/XhmikosR/decompress/releases/tag/v11.1.4
- https://github.com/XhmikosR/decompress
More XhmikosR vulnerabilities
- TI-2026-38565 decompress: Archive extraction can create files and links outside the target directory CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-101894 · CVE Program
- CVE-2026-101894 · NVD
- FIRST EPSS
- GHSA-hrh2-vp3x-79xf · GitHub Advisory Database · CC BY 4.0
- CVE-2026-101894 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences