{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.6.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9aa100a744977cd3d85e462fe5f190c866d7e8a0"
            }
          ],
          "repo": "https://github.com/s9y/serendipity",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-v645-243f-jwgh"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-304"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67351.json"
  },
  "details": "Serendipity before 2.6.1 contains an authentication context confusion vulnerability where password validation and session loading operate independently without ensuring both use the same user record. An authenticated Editor can create a username collision with an Administrator account and obtain administrative privileges by logging in with their own password while the session loads the Administrator's account data.",
  "id": "CVE-2026-67351",
  "modified": "2026-08-02T03:32:11.751096018Z",
  "published": "2026-07-30T13:57:51.756Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67351.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/s9y/Serendipity/security/advisories/GHSA-v645-243f-jwgh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67351"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/serendipity-authentication-bypass-via-username-collision"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Serendipity \u003c 2.6.1 Authentication Bypass via Username Collision"
}