{"id":"CVE-2026-49216","state":"PUBLISHED","title":"Symfony UX: XSS in symfony/ux-autocomplete via unescaped AJAX response data","description":"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>${item[labelField]}</div>) rather than text, allowing attacker-controlled markup from user-supplied dropdown values to execute in the browser of any user who opens an autocomplete widget backed by the same data. This issue is fixed in versions 2.36.0 and 3.1.0.","publishedAt":"2026-07-17T16:15:34.990Z","updatedAt":"2026-07-21T01:44:13.539Z","severity":{"score":5.1,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["symfony ux"],"affected":[{"vendor":"symfony","product":"ux","versions":[{"version":">= 3.0.0, < 3.1.0","status":"affected"},{"version":"< 2.36.0","status":"affected"}]}],"references":["https://github.com/symfony/ux/security/advisories/GHSA-mwqm-4fw3-cjvr","https://github.com/symfony/ux/commit/842ae54bc74de389299f975f01aafae272cb0019","https://github.com/symfony/ux/releases/tag/v2.36.0","https://github.com/symfony/ux/releases/tag/v3.1.0"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49216.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49216","state":"PUBLISHED","datePublished":"2026-07-17T16:15:34.990Z","dateUpdated":"2026-07-21T01:44:13.539Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-28T03:42:34.341Z"},"containers":{"cna":{"title":"Symfony UX: XSS in symfony/ux-autocomplete via unescaped AJAX response data","descriptions":[{"lang":"en","value":"Symfony UX is a JavaScript ecosystem for Symfony. From 2.2.0 until 2.36.0 and 3.1.0, the Stimulus controller in symfony/ux-autocomplete renders AJAX response items in _createAutocompleteWithRemoteData() by interpolating the text field into HTML template literals (<div>${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."}],"affected":[{"vendor":"symfony","product":"ux","versions":[{"version":">= 3.0.0, < 3.1.0","status":"affected"},{"version":"< 2.36.0","status":"affected"}]}],"references":[{"url":"https://github.com/symfony/ux/security/advisories/GHSA-mwqm-4fw3-cjvr","name":"https://github.com/symfony/ux/security/advisories/GHSA-mwqm-4fw3-cjvr","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/symfony/ux/commit/842ae54bc74de389299f975f01aafae272cb0019","name":"https://github.com/symfony/ux/commit/842ae54bc74de389299f975f01aafae272cb0019","tags":["x_refsource_MISC"]},{"url":"https://github.com/symfony/ux/releases/tag/v2.36.0","name":"https://github.com/symfony/ux/releases/tag/v2.36.0","tags":["x_refsource_MISC"]},{"url":"https://github.com/symfony/ux/releases/tag/v3.1.0","name":"https://github.com/symfony/ux/releases/tag/v3.1.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":5.1,"baseSeverity":"MEDIUM","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-17T16:15:34.990Z"},"source":{"advisory":"GHSA-mwqm-4fw3-cjvr","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-21T01:43:58.784121Z","id":"CVE-2026-49216","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-21T01:44:13.539Z"}}]}}}