Use of Non-Canonical URL Paths for Authorization Decisions in Jetty - CVE-2026-8384
Published: July 13, 2026
Vulnerability identifier: #VU137401
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-8384
CWE-ID: CWE-647
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Eclipse
Affected software:
Jetty
Jetty
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass path-based security constraints.
The vulnerability exists due to use of non-canonical url paths for authorization decisions in org.eclipse.jetty.util.URIUtil.canonicalPath() when processing request paths containing semicolon path parameters followed by slash-dot segments. A remote attacker can send a specially crafted request path to bypass path-based security constraints.
This can occur when Jetty SecurityHandler.PathMapped is used to protect a path prefix such as /admin/*, causing the non-normalized canonical path to be matched against security constraints.
How to mitigate CVE-2026-8384
Install security update from vendor's website.