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Vulnerability record · CVE-2016-4800 · published 13 April 2017

CVE-2016-4800: Eclipse jetty improper access control vulnerability

Eclipse · Jetty

The path normalization mechanism in PathResource class in Eclipse Jetty 9.3.x before 9.3.9 on Windows allows remote attackers to bypass protected resource restrictions and other security constraints via a URL with certain escaped characters, related to backslashes.

9.8 CVSS 3.0 Critical EPSS 6.4% · top 6.6% CWE-284 · Improper access control
9.8CVSS 3.0 base score, v2 7.5
6.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

Description

The path normalization mechanism in PathResource class in Eclipse Jetty 9.3.x before 9.3.9 on Windows allows remote attackers to bypass protected resource restrictions and other security constraints via a URL with certain escaped characters, related to backslashes.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://dev.eclipse.org/mhonarc/lists/jetty-announce/msg00092.html PatchVendor Advisory
http://www.ocert.org/advisories/ocert-2016-001.html MitigationPatchThird Party Advisory
http://www.securityfocus.com/bid/90945 Third Party AdvisoryVDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-16-362 Third Party AdvisoryVDB Entry
https://security.netapp.com/advisory/ntap-20190307-0006/
https://www.oracle.com/security-alerts/cpuoct2020.html
http://dev.eclipse.org/mhonarc/lists/jetty-announce/msg00092.html PatchVendor Advisory
http://www.ocert.org/advisories/ocert-2016-001.html MitigationPatchThird Party Advisory
http://www.securityfocus.com/bid/90945 Third Party AdvisoryVDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-16-362 Third Party AdvisoryVDB Entry
https://security.netapp.com/advisory/ntap-20190307-0006/
https://www.oracle.com/security-alerts/cpuoct2020.html

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-4800), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.