CVE-2026-102479

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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-ch7p-g5pm-3gqx	Vendor Advisory
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/352	Issue Tracking Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/10/28/19

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:eclipse:vert.x::::::::
	cpe:2.3:a:eclipse:vert.x:5.2.0:::::::*

History

28 Oct 2026, 21:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/10/28/19 -

20 Oct 2026, 19:31

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.9
CPE		cpe:2.3:a:eclipse:vert.x:::::::: cpe:2.3:a:eclipse:vert.x:5.2.0:::::::*
First Time		Eclipse Eclipse vert.x
References	~~() https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-ch7p-g5pm-3gqx -~~	() https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-ch7p-g5pm-3gqx - Vendor Advisory
References	~~() https://gitlab.eclipse.org/security/cve-assignment/-/work_items/352 -~~	() https://gitlab.eclipse.org/security/cve-assignment/-/work_items/352 - Issue Tracking, Third Party Advisory

16 Oct 2026, 19:17

Type	Values Removed	Values Added
CWE		CWE-444

14 Oct 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-14 19:17

Updated : 2026-10-28 21:16

NVD link : CVE-2026-102479

Mitre link : CVE-2026-102479

CVE.ORG link : CVE-2026-102479

JSON object : View

Products Affected

eclipse

vert.x

CWE

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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