SEPTEMBER 17, 2026
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Case File

CVE-2026-19203

HIGH · CVSS 8.3 EPSS 0.29% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-08 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

Jetty servers are vulnerable to HTTP request smuggling due to improper handling of chunked requests, where a lone LF character can be misinterpreted as a request boundary. This discrepancy between Jetty and intermediary proxies can lead to unauthorized request manipulation, potentially compromising the integrity and confidentiality of the application. Organizations using Jetty should prioritize patching this vulnerability, especially those handling sensitive data or operating in high-security environments.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-19203
Severity
HIGH
CVSS
8.3
EPSS
0.29%

Original NVD Description

A client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling. This is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination.