{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.1.0"
              },
              {
                "introduced": "0"
              },
              {
                "fixed": "2.36.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "3cef8e0d9557bbde60c3f1bfd2cbb1004af7fc9a"
            },
            {
              "introduced": "0"
            },
            {
              "fixed": "4c883fdb0f0e7ea577f851bd457024f7e88788c9"
            },
            {
              "fixed": "5ccec9746faa28d79a87138042174c3853d5702b"
            },
            {
              "fixed": "a224b5af3e2e33ee14ac71356ae0e0877900a81c"
            }
          ],
          "repo": "https://github.com/symfony/ux",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-34w5-c283-j9fg"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-345"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49212.json"
  },
  "details": "Symfony UX is a JavaScript ecosystem for Symfony. From 2.8.0 until 2.36.0 and 3.1.0, the HMAC computed by Symfony\\UX\\LiveComponent\\LiveComponentHydrator covered only sorted prop key/value pairs and did not include the component name, the slot identifier (props vs propsFromParent), or request context, allowing a signed blob minted for one component or slot to be replayed in another and set a read-only prop on a target component. This issue is fixed in versions 2.36.0 and 3.1.0.",
  "id": "CVE-2026-49212",
  "modified": "2026-07-19T03:30:57.764819604Z",
  "published": "2026-07-17T16:03:27.784Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/symfony/ux/releases/tag/v2.36.0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/ux/releases/tag/v3.1.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49212.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/symfony/ux/security/advisories/GHSA-34w5-c283-j9fg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49212"
    },
    {
      "type": "FIX",
      "url": "https://github.com/symfony/ux/commit/a224b5af3e2e33ee14ac71356ae0e0877900a81c"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Symfony UX: LiveComponentHydrator HMAC checksum lacks component and slot binding"
}