Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 18.6%
CVSS Severity
CVSS v3 Score 5.9
References
Products affected by CVE-2026-102479
-
cpe:2.3:a:eclipse:vert.x:5.0.0
-
cpe:2.3:a:eclipse:vert.x:5.0.1
-
cpe:2.3:a:eclipse:vert.x:5.0.10
-
cpe:2.3:a:eclipse:vert.x:5.0.11
-
cpe:2.3:a:eclipse:vert.x:5.0.12
-
cpe:2.3:a:eclipse:vert.x:5.0.2
-
cpe:2.3:a:eclipse:vert.x:5.0.3
-
cpe:2.3:a:eclipse:vert.x:5.0.4
-
cpe:2.3:a:eclipse:vert.x:5.0.5
-
cpe:2.3:a:eclipse:vert.x:5.0.6
-
cpe:2.3:a:eclipse:vert.x:5.0.7
-
cpe:2.3:a:eclipse:vert.x:5.0.8
-
cpe:2.3:a:eclipse:vert.x:5.0.9
-
cpe:2.3:a:eclipse:vert.x:5.1.0
-
cpe:2.3:a:eclipse:vert.x:5.1.1
-
cpe:2.3:a:eclipse:vert.x:5.1.2
-
cpe:2.3:a:eclipse:vert.x:5.1.3
-
cpe:2.3:a:eclipse:vert.x:5.1.4
-
cpe:2.3:a:eclipse:vert.x:5.1.5
-
cpe:2.3:a:eclipse:vert.x:5.1.8
-
cpe:2.3:a:eclipse:vert.x:5.1.9
-
cpe:2.3:a:eclipse:vert.x:5.2.0