The Vert.x Web static handler component cache can be manipulated to deny the access to static files served by the handler using specifically crafted request URI.
The issue comes from an improper implementation of the C. rule of section 5.2.4 of RFC3986 and is fixed in Vert.x Core component (used by Vert.x Web): https://github.com/eclipse-vertx/vert.x/pull/5895
Steps to reproduce
Given a file served by the static handler, craft an URI that introduces a string like bar%2F..%2F after the last / char to deny the access to the URI with an HTTP 404 response. For example https://example.com/foo/index.html can be denied with https://example.com/foo/bar%2F..%2Findex.html
Mitgation
Disabling Static Handler cache fixes the issue.
StaticHandler staticHandler = StaticHandler.create().setCachingEnabled(false);
References
| Link | Resource |
|---|---|
| https://github.com/eclipse-vertx/vert.x/pull/5895 | Issue Tracking Patch |
| https://github.com/vert-x3/vertx-web/issues/2836 | Exploit |
Configurations
Configuration 1 (hide)
|
History
05 Feb 2026, 16:50
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.3 |
30 Jan 2026, 19:41
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
| First Time |
Eclipse
Eclipse vert.x-web |
|
| CPE | cpe:2.3:a:eclipse:vert.x-web:*:*:*:*:*:*:*:* | |
| References | () https://github.com/eclipse-vertx/vert.x/pull/5895 - Issue Tracking, Patch | |
| References | () https://github.com/vert-x3/vertx-web/issues/2836 - Exploit |
15 Jan 2026, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
15 Jan 2026, 21:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-01-15 21:16
Updated : 2026-02-05 16:50
NVD link : CVE-2026-1002
Mitre link : CVE-2026-1002
CVE.ORG link : CVE-2026-1002
JSON object : View
Products Affected
eclipse
- vert.x-web
CWE
CWE-444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')