{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:cacti:cacti:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.2.31"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1e8eaca26b84b128c39ce8cc8ece42d7ff76aac1"
            },
            {
              "fixed": "2fa404e70a5702be10682555911228e8e51ba198"
            }
          ],
          "repo": "https://github.com/cacti/cacti",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-273r-qr93-wgcp"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-384"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40082.json"
  },
  "details": "Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing session_regenerate_id() after login, leading to Session Fixation. session_regenerate_id() is NOT called after successful login. The login flow at auth_login.php:203-207 directly sets $_SESSION[SESS_USER_ID] without rotating the session ID. The session cookie configuration is otherwise good (httponly=true, samesite=Strict, secure=true for HTTPS at include/global.php:513-537), but these do not prevent session fixation via same-site vectors. This issue has been fixed in version 1.2.31.",
  "id": "CVE-2026-40082",
  "modified": "2026-07-08T05:38:55.754522586Z",
  "published": "2026-06-25T22:33:45.871Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Cacti/cacti/releases/tag/release%2F1.2.31"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40082.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Cacti/cacti/security/advisories/GHSA-273r-qr93-wgcp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40082"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Cacti/cacti/commit/2fa404e70a5702be10682555911228e8e51ba198"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Cacti: Session Fixation via missing session_regenerate_id() after login"
}