{"id":"CVE-2026-123785","summary":"Fluxbox through 1.3.7 Infinite Loop via Menu::updateMenu() Style Geometry","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.","modified":"2026-11-07T02:48:23.797688234Z","published":"2026-11-06T15:01:01.397Z","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"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/fluxbox/fluxbox","events":[{"introduced":"0"},{"last_affected":"88a74ff1cde22be3e894498ffd88934dc92dfef0"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StandardRange","range":[{"introduced":"0"},{"last_affected":"1.3.7"}]}]}}],"versions":["Release-1_3_7","Release-1_3_6","Release-1_3_5","Release-1_3_4","Release-1_3_3","Release-1_3_2","Release-1_3_1","Release-1_3_0","Release-1_1_1","Release-1_1_0_1","Release-1_1_0","Release-1_0_0","Release-1.0rc3","Release-1_0rc","Release-0_9_15","Release-0_9_14","Release-0_9_13","Release-0_9_12","Release-0_9_11"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123785.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","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"}]}