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Vulnerability record · CVE-2026-17524 · published 28 July 2026

CVE-2026-17524: Path traversal vulnerability

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.

8.7 CVSS 4.0 High EPSS 1.2% · top 34.3% CWE-22 · Path traversal Deferred
8.7CVSS 4.0 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
30 Jul 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/fpsqdb/zip-lib/commit/0c29b1e17050f2611f4f37e6aaa92a60b3cb89d5
https://github.com/fpsqdb/zip-lib/issues/14
https://security.snyk.io/vuln/SNYK-JS-ZIPLIB-13834403

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Source: NIST National Vulnerability Database (record CVE-2026-17524), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.