CVE-2026-102479 Eclipse Vert.x - HTTP Request Smuggling

Eclipse Vert.x 5.0.0 to 5.0.12, 5.1.0 to 5.1.9, and 5.2.0 contains an HTTP request smuggling vulnerability caused by improper canonicalization of HTTP/1.x headers in io.vertx:vertx-core, letting attackers perform request smuggling via crafted headers.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
HTTP Request Smuggling
Impact
HTTP Request Smuggling
CVSS vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
14 October 2026
Updated
15 October 2026

Vendor fix

Update to a version later than 5.2.0 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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