HTTP Request Smuggling Affecting org.eclipse.jetty:jetty-http package, versions [,12.0.38)[12.1.0.alpha0,12.1.12)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published8 Sept 2026
- disclosed8 Sept 2026
- creditUnknown
Introduced: 8 Sep 2026
NewCVE-2026-19203 (opens in a new tab)How to fix?
Upgrade org.eclipse.jetty:jetty-http to version 12.0.38, 12.1.12 or higher.
Overview
org.eclipse.jetty:jetty-http is an is a http module for jetty server.
Affected versions of this package are vulnerable to HTTP Request Smuggling in the chunked request parsing of HttpParser, which accepts a lone LF, rather than CRLF, as the line terminator for chunk extensions, chunk data, and trailers. An attacker can make Jetty and an intermediary proxy interpret different request boundaries, smuggling a request past the proxy, by sending an HTTP/1.1 chunked request whose chunk or trailer terminators use a bare LF. This requires a front-end proxy that parses the chunk framing differently from Jetty, and the exact LF handling depends on the configured HTTP compliance mode.