CVE-2026-49216: medium-severity vulnerability in symfony ux
Symfony UX: XSS in symfony/ux-autocomplete via unescaped AJAX response data
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.1epss 0.3%
Symfony UX is a JavaScript ecosystem for Symfony. From 2.2.0 until 2.36.0 and 3.1.0, the Stimulus controller in symfony/ux-autocomplete renders AJAX response items in _createAutocompleteWithRemoteData() by interpolating the text field into HTML template literals (<div>${item[labelField]}</div>) rather than text, allowing attacker-controlled markup from user-supplied dropdown values to execute in the browser of any user who opens an autocomplete widget backed by the same data. This issue is fixed in versions 2.36.0 and 3.1.0.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Affected products
symfony · uxRelated CVEs — symfony ux
In the same product, most dangerous first.
CVE-2026-49209MEDIUMSymfony UX: Denial of service in symfony/ux-live-component via unbounded batch action requestsEPSS 0.6%CVE-2026-49211MEDIUMSymfony UX: Information exposure via unescaped LIKE wildcards in EntitySearchUtilEPSS 0.5%CVE-2026-49208MEDIUMSymfony UX: Format-less date LiveProps parsed with the permissive DateTime constructorEPSS 0.4%CVE-2026-49210LOWSymfony UX: XSS in symfony/ux-live-component via attacker-controlled child component tagEPSS 0.3%CVE-2026-55877MEDIUMSymfony UX: XSS in symfony/ux-icons via unsanitized SVG content in local files and Iconify on-demand responsesEPSS 0.3%CVE-2025-47946MEDIUMsymfony/ux-live-component and symfony/ux-twig-component vulnerable to unsanitized HTML attribute injection via ComponentAttributesEPSS 0.3%