CVE-2026-49216 (GCVE-0-2026-49216)

Vulnerability from cvelistv5 – Published: 2026-07-17 16:15 – Updated: 2026-07-17 16:15
VLAI
Title
Symfony UX: XSS in symfony/ux-autocomplete via unescaped AJAX response data
Summary
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>${item[labelField]}</div>) rather than text, allowing attacker-controlled markup from user-supplied dropdown values to execute in the browser of any user who opens an autocomplete widget backed by the same data. This issue is fixed in versions 2.36.0 and 3.1.0.
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
symfony ux Affected: >= 3.0.0, < 3.1.0
Affected: < 2.36.0
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{
  "containers": {
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      "affected": [
        {
          "product": "ux",
          "vendor": "symfony",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0.0, \u003c 3.1.0"
            },
            {
              "status": "affected",
              "version": "\u003c 2.36.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Symfony UX is a JavaScript ecosystem for Symfony. From 2.2.0 until 2.36.0 and 3.1.0, the Stimulus controller in symfony/ux-autocomplete renders AJAX response items in _createAutocompleteWithRemoteData() by interpolating the text field into HTML template literals (\u003cdiv\u003e${item[labelField]}\u003c/div\u003e) 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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "ACTIVE",
            "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",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-17T16:15:34.990Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/symfony/ux/security/advisories/GHSA-mwqm-4fw3-cjvr",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/symfony/ux/security/advisories/GHSA-mwqm-4fw3-cjvr"
        },
        {
          "name": "https://github.com/symfony/ux/commit/842ae54bc74de389299f975f01aafae272cb0019",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/ux/commit/842ae54bc74de389299f975f01aafae272cb0019"
        },
        {
          "name": "https://github.com/symfony/ux/releases/tag/v2.36.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/ux/releases/tag/v2.36.0"
        },
        {
          "name": "https://github.com/symfony/ux/releases/tag/v3.1.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/ux/releases/tag/v3.1.0"
        }
      ],
      "source": {
        "advisory": "GHSA-mwqm-4fw3-cjvr",
        "discovery": "UNKNOWN"
      },
      "title": "Symfony UX: XSS in symfony/ux-autocomplete via unescaped AJAX response data"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-49216",
    "datePublished": "2026-07-17T16:15:34.990Z",
    "dateReserved": "2026-05-28T03:42:34.341Z",
    "dateUpdated": "2026-07-17T16:15:34.990Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-49216\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-07-17T17:17:16.190\",\"lastModified\":\"2026-07-17T18:00:02.913\",\"vulnStatus\":\"Undergoing Analysis\",\"cveTags\":[],\"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 (\u003cdiv\u003e${item[labelField]}\u003c/div\u003e) 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\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"symfony\",\"product\":\"ux\",\"versions\":[{\"version\":\"\u003e= 3.0.0, \u003c 3.1.0\",\"status\":\"affected\"},{\"version\":\"\u003c 2.36.0\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":5.1,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"ACTIVE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"LOW\",\"subIntegrityImpact\":\"LOW\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"references\":[{\"url\":\"https://github.com/symfony/ux/commit/842ae54bc74de389299f975f01aafae272cb0019\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/symfony/ux/releases/tag/v2.36.0\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/symfony/ux/releases/tag/v3.1.0\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/symfony/ux/security/advisories/GHSA-mwqm-4fw3-cjvr\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}



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