CVE-2026-18661
Received Received - Intake

Path Traversal in Eclipse Jetty Annotations

Publication date: 2026-10-15

Last updated on: 2026-10-15

Assigner: Eclipse Foundation

Description
In Eclipse Jetty, across various versions of `jetty-annotations`, and `jetty-eeN-annotations`, the Jakarta Spec authoritative url-pattern rules for mixed `@ServletSecurity` annotation, and `web.xml` defined `security-constraint` on the same `url-pattern` were not being applied if the `web.xml` had more than 1 `url-pattern` for a servlet, and had a `security-constraint` applying to only some of those `url-pattern` definitions.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-15
Last Modified
2026-10-15
Generated
2026-10-15
AI Q&A
2026-10-15
EPSS Evaluated
N/A
NVD
CVE-2026-18661
EUVD
EUVD-2026-101954

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
Eclipse Foundation Eclipse Jetty 12.1.0
Eclipse Foundation Eclipse Jetty 12.0.0
Eclipse Foundation Eclipse Jetty 11.0.0
Eclipse Foundation Eclipse Jetty 10.0.0
Eclipse Foundation Eclipse Jetty 9.4.0

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability in Eclipse Jetty affects versions of jetty-annotations and jetty-eeN-annotations. When a web.xml file defines multiple URL patterns for a servlet and applies security constraints to only some of those patterns, Jetty fails to enforce the security constraints correctly if there is also a @ServletSecurity annotation present. This can lead to unauthorized access to restricted resources.

Impact Analysis

This vulnerability could allow attackers to bypass intended security restrictions and access protected resources without proper authorization. If your application uses Jetty with mixed security configurations (annotations and web.xml), sensitive data or functionality might be exposed to unauthorized users.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate compliance requirements under GDPR (data protection) and HIPAA (health information privacy). Unauthorized access could result in data breaches, leading to legal penalties and reputational damage.

Mitigation Strategies

Update Eclipse Jetty to a version beyond 12.1.11 where this issue is resolved. Review web.xml files for servlets with multiple URL patterns and ensure security constraints are consistently applied across all patterns.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-18661. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart