Bug 2529768 (CVE-2026-19203)

Summary: CVE-2026-19203 org.eclipse.jetty/jetty-http: Jetty: HTTP request smuggling via crafted chunked requests
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: abrianik, anthomas, asyoung, ataylor, ccranfor, csuconic, dbruscin, dfreiber, drow, eglynn, ehelms, ehugonne, ewittman, fmariani, fmongiar, ggainey, ggrzybek, gmalinko, gtully, janstey, jburrell, jhollowa, jjoyce, jnethert, jpasqual, jpechane, jpretori, jraez, jschluet, jsherman, juwatts, jwon, kaycoth, kvanderr, lhh, mburns, mcarlett, mdellweg, mgarciac, mhulan, nipatil, nmoumoul, osousa, pantinor, parichar, pcreech, pdelbell, pjindal, prichard, rchan, rgemmell, rgodfrey, rhel-process-autobot, rkubis, rstepani, sdawley, smallamp, sthirugn, tasato, tbish, tcunning, tlavocat, tmalecek, vkumar, watson-tool-maintainers, yfang
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A flaw was found in Jetty. A remote attacker can exploit this vulnerability by sending specially crafted HTTP/1.1 chunked requests. This can cause Jetty and an intermediary proxy to interpret different request boundaries, potentially leading to HTTP request smuggling. This issue arises from Jetty's acceptance of a lone Line Feed (LF) character as a terminator during chunked request parsing.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-09-08 12:47:37 UTC 
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.