CVE-2026-102479
Medium · 5.9CVSS
5.9
EPSS
0.3%
Published
Oct 14, 2026
CISA due date
—
The record
In Eclipse Vert.x versions [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x HTTP/1.x decoder uses a canonicalization for well known HTTP headers, the canonicalization process interprets well crafted headers as headers of this list, allowing for instance Content-Xength to be interpeted as Content-Length. This can be exploited for request smuggling purpose. The impacted component is io.vertx:vertx-core.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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Related vulnerabilities
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- CVE-2026-116127 Starlet versions before 0.33 for Perl send a body in responses to HEAD requests… CWE-444
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- CVE-2026-118264 Echo is a Go web framework. CWE-444
- CVE-2026-103995 Response body and chunk parsing would handle non-hex or negative integers incorrectly… CWE-444
- CVE-2026-115823 Starman versions before 0.4019 for Perl send response bodies for HEAD requests… CWE-444