{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.17.0"
              },
              {
                "fixed": "2.36.1"
              },
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.2.0"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "80b36bcbeb2902a55495db2afd544f738c73148f"
            },
            {
              "fixed": "dfd2ce941ec3e92af36427685cfb4e900ea9244c"
            },
            {
              "introduced": "3cef8e0d9557bbde60c3f1bfd2cbb1004af7fc9a"
            },
            {
              "fixed": "721417c64bbc85022c56d1e3fb7f66874a38cef2"
            },
            {
              "fixed": "3a4964ec3700f0af4e13f7bfbf8bb3174c3e79d1"
            }
          ],
          "repo": "https://github.com/symfony/ux",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-6v8j-33hc-mv84"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55877.json"
  },
  "details": "Symfony UX is a JavaScript ecosystem for Symfony. From 2.17.0 before 2.36.1 and from 3.0.0 before 3.2.0, the ux_icon() Twig function is marked is_safe=['html'] and Icon::toHtml() inlines SVG source verbatim, allowing unsanitized local SVG files or Iconify on-demand JSON body responses containing nested script elements, on* event handlers, or dangerous URL schemes to execute cross-site scripting. This issue is fixed in versions 2.36.1 and 3.2.0.",
  "id": "CVE-2026-55877",
  "modified": "2026-07-15T01:48:56.965974329Z",
  "published": "2026-07-08T21:32:37.407Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/symfony/ux/releases/tag/v2.36.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/ux/releases/tag/v3.2.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55877.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/symfony/ux/security/advisories/GHSA-6v8j-33hc-mv84"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55877"
    },
    {
      "type": "FIX",
      "url": "https://github.com/symfony/ux/commit/3a4964ec3700f0af4e13f7bfbf8bb3174c3e79d1"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Symfony UX: XSS in symfony/ux-icons via unsanitized SVG content in local files and Iconify on-demand responses"
}