CVE-2026-94439 HTTP Server - HTTP Request Smuggling

An HTTP server improperly continues to read and serve HTTP requests after sending a 2xx response to an HTTP/1 CONNECT request without hijacking the connection, causing request smuggling due to tunnel misinterpretation.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.32% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
HTTP Request Smuggling
Impact
HTTP Request Smuggling
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
8 October 2026
Updated
15 October 2026
Weakness
CWE-444

Vendor fix

Update to the latest version that correctly handles HTTP/1 CONNECT requests by hijacking the connection or properly closing it.

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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