Bug 2553177 (CVE-2026-18662)

Summary: CVE-2026-18662 org.eclipse.jetty/jetty-security: Eclipse Jetty: Access control bypass via improper security constraint combination
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: abrianik, anthomas, asyoung, ataylor, ccranfor, csuconic, dbruscin, dfreiber, drow, ehelms, ewittman, fmariani, ggainey, ggrzybek, gmalinko, gtully, janstey, jburrell, jhollowa, jpasqual, jpechane, jraez, jsherman, juwatts, jwon, kaycoth, kvanderr, mcarlett, mdellweg, 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
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Hardware: All   
OS: Linux   
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A flaw was found in Eclipse Jetty. When multiple security constraints are configured with identical HTTP method omission definitions and no URL patterns, the server improperly overrides earlier constraints rather than combining their rules as required by the Jakarta Servlet specification. A remote attacker can exploit this vulnerability to bypass intended access control restrictions and gain unauthorized access to protected web application resources.
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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 2026-10-15 09:52:02 UTC 
In Eclipse Jetty, across various versions of `jetty-security`, and `jetty-eeN-security`, two or more security constraints with the same http-method-omission set, and no url-patterns, are not combined properly per Jakarta Servlet Spec.



Resulting in later http-method-omission sets overriding previous constraints with the same http-method-omission set.