Bug 2500564 (CVE-2026-47423)

Summary: CVE-2026-47423 dompurify: DOMPurify: Cross-site scripting vulnerability allows information disclosure
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: aazores, abarbaro, abrianik, alizardo, amctagga, anjoseph, anpicker, aoconnor, ataylor, bniver, cdrage, chfoley, cmah, dbruscin, dkeler, dschmidt, eaguilar, ebaron, ehugonne, flucifre, fmariani, ggrzybek, gmalinko, gmeno, gparvin, groman, hasun, janstey, jchui, jfula, jhe, jlanda, jowilson, jprabhak, jraez, jwong, jwon, kaycoth, kbempah, kshier, ktsao, kvanderr, manissin, mbenjamin, mcarlett, mhackett, nboldt, nyancey, oaljalju, omaciel, ometelka, parichar, pjindal, psrna, ptisnovs, rgodfrey, rhaigner, rstepani, rushinde, sdawley, simaishi, solenoci, sostapov, stcannon, suppawar, swoodman, syedriko, tasato, tcunning, teagle, thason, ttakamiy, vereddy, wtam, xdharmai, yfang, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in DOMPurify, a DOM-only cross-site scripting (XSS) sanitizer. Due to the default allowance of `selectedcontent`, a remote attacker could craft a malicious payload that, after initial sanitization, could be re-cloned by browsers, leading to the execution of unsanitized markup. This could result in information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-07-14 20:02:46 UTC
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. In 3.4.4, DOMPurify allowed selectedcontent by default, allowing browsers to re-clone an XSS payload after sanitization so that unsanitized markup inside <selectedcontent> is returned. This issue is fixed in version 3.4.5.