{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "bbaf6b7f729b858a7435bf28b97119112177479e"
            }
          ],
          "repo": "https://github.com/elysiajs/elysia",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-f45g-68q3-5w8x"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1333"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30837.json"
  },
  "details": "Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation and client-server communication. Prior to 1.4.26 , t.String({ format: 'url' }) is vulnerable to ReDoS. Repeating a partial url format (protocol and hostname) multiple times cause regex to slow down significantly. This vulnerability is fixed in 1.4.26.",
  "id": "CVE-2026-30837",
  "modified": "2026-04-01T23:10:07.118947081Z",
  "published": "2026-03-10T20:12:14.627Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30837.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/elysiajs/elysia/security/advisories/GHSA-f45g-68q3-5w8x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30837"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/EdamAme-x/elysia-poc-redos"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Elysia has a string URL format redos"
}