CVE-2026-102479CWE-444
CVE-2026-102479
Medium · published October 14, 2026
What it is
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.
The record
Technical detail
- CVSS v3.1
- 5.9 · MEDIUM
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v4.0
- 8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- EPSS
- 0.00270 · 18.1th percentile
- Weakness
- CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
- Published
- 2026-10-14T23:17Z
Affected products (2)
| Product | Versions | Fixed in |
|---|
| eclipse/vert.x | ≥ 5.0.0, < 5.1.10 | 5.1.10 |
| eclipse/vert.x | all versions | — |
References (2)
EPSS history
Timeline
16 OCT 03:27Z
EPSS moved — → 0%
epss
14 OCT 18:43Z
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…
cvelistv5
14 OCT 18:43Z
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…
cvelistv5