CVE-2026-19203

8.3 highEPSS 0.3%

High (8.3). EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.3 high

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 23% of CVEs (scores of 2026-10-31)
CWE: CWE-444
Published: 2026-09-08
Modified: 2026-09-08
Record from: the NVD, synced 2026-10-19

References

https://github.com/jetty/jetty.project/security/advisories/GHSA-xc35-c22g-239h

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