Path traversal in zip-lib
Priority MEDIUM 46CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.
Summary
Versions of the package zip-lib before 1.1.0 are vulnerable to Directory Traversal via the caching mechanism for path validation during the extraction process. An attacker can bypass security checks designed to prevent directory traversal. The intended security function, isOutsideTargetFolder, only checks and caches the path status when the initial directory symlink is created during the first extraction.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01152 67th percentileScored 2026-11-07
Fix Fixed zip-lib: 1.1.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
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 |
|---|---|---|---|---|---|
| — | zip-lib | before 1.1.0 | 1.1.0 | Patch available | CNA |
- zip-lib Vendor— Affected before 1.1.0 Fixed in 1.1.0 Patch available CNA
Remediation
- Fix · CNA zip-lib Fixed in 1.1.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-17524
- 2026-10-03 Alias added: GHSA-73hr-7685-xwj3
References
Sources
- CVE-2026-17524 · CVE Program
- CVE-2026-17524 · NVD
- FIRST EPSS
- GHSA-73hr-7685-xwj3 · GitHub Advisory Database · CC BY 4.0
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