{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "last_affected": "1.3.7"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "88a74ff1cde22be3e894498ffd88934dc92dfef0"
            }
          ],
          "repo": "https://github.com/fluxbox/fluxbox",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-835"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123785.json"
  },
  "details": "Fluxbox through 1.3.7 contains an infinite loop vulnerability in Menu::updateMenu() in src/FbTk/Menu.cc that allows attackers to hang the window manager via crafted style geometry values. Attackers can supply a style with an oversized unbounded menu.titleHeight so the column loop never terminates, causing sustained CPU use and denial of service at startup.",
  "id": "CVE-2026-123785",
  "modified": "2026-11-07T02:30:24.772804205Z",
  "published": "2026-11-06T15:01:01.397Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123785.json"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/fluxbox/fluxbox"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/fluxbox/fluxbox/blob/Release-1_3_7/src/FbTk/Menu.cc#L433-L448"
    },
    {
      "type": "FIX",
      "url": "https://github.com/fluxbox/fluxbox/pull/90"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123785"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/fluxbox-through-1.3.7-infinite-loop-via-menu-updatemenu-style-geometry"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Fluxbox through 1.3.7 Infinite Loop via Menu::updateMenu() Style Geometry"
}