Bug 2520546 (CVE-2026-75140)

Summary: CVE-2026-75140 org.jsoup/jsoup: jsoup: Denial of Service via deeply nested XML documents
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: ant, anujha, aschwart, asoldano, aszczucz, ataylor, avibelli, bbaranow, bgeorges, bmaxwell, boliveir, bstansbe, cescoffi, csuconic, dandread, dbruscin, dkreling, dlofthou, drichtar, eglynn, ehugonne, ewittman, fmongiar, gbenhaim, gmalinko, gsmet, gtully, istudens, ivassile, iweiss, janstey, jjoyce, jmartisk, jpretori, jschluet, jsherman, kvanderr, lhh, lthon, manderse, mburns, mgarciac, mosmerov, mposolda, msvehla, nipatil, niyer, nwallace, olubyans, ozzy, pantinor, pberan, pdelbell, pesilva, pgallagh, pjindal, pmackay, probinso, rgemmell, rgodfrey, rguimara, rhel-process-autobot, rjohnson, rkubis, rmartinc, rruss, rstancel, rstepani, rsvoboda, sbiarozk, ssilvert, sthorger, tbish, thjenkin, tlavocat, tqvarnst, twaugh, varjain, vdosoudi, vmuzikar, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in jsoup. A remote attacker could exploit an uncontrolled resource consumption vulnerability in the XmlTreeBuilder by providing a deeply nested XML document with uniquely-namespaced elements. This causes the builder to copy the entire inherited namespace map on every start element, leading to quadratic time and memory complexity. Successful exploitation could exhaust JVM heap memory, resulting in an OutOfMemoryError and terminating the application, effectively causing a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-20 16:24:39 UTC 
jsoup through 1.23.2, fixed in commit 862ba2f, contains an uncontrolled resource consumption vulnerability in XmlTreeBuilder that allows remote attackers to exhaust JVM heap memory by supplying a deeply nested XML document with uniquely-namespaced elements. The builder copies the entire inherited namespace map on every start element, causing quadratic time and memory complexity, which attackers can exploit to trigger an OutOfMemoryError and terminate the application.