{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "c633d9d85837e60bdd4c65b4e3a3da12d22c0605"
            }
          ],
          "repo": "https://github.com/kelvinmo/simplejwt",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-xw36-67f8-339x"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33204.json"
  },
  "details": "SimpleJWT is a simple JSON web token library written in PHP. Prior to version 1.1.1, an unauthenticated attacker can perform a Denial of Service via JWE header tampering when PBES2 algorithms are used. Applications that call JWE::decrypt() on attacker-controlled JWEs using PBES2 algorithms are affected. This issue has been patched in version 1.1.1.",
  "id": "CVE-2026-33204",
  "modified": "2026-04-01T23:08:44.058298235Z",
  "published": "2026-03-20T22:37:13.411Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33204.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33204"
    }
  ],
  "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": "SimpleJWT has an Unauthenticated Denial of Service via JWE header tampering"
}