{"id":"CVE-2026-123785","published":"2026-11-06T15:17:21.467","lastModified":"2026-11-06T17:17:21.097","description":"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.","cvssScore":5.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwes":["CWE-835"],"vendors":[],"products":[],"references":[{"url":"https://github.com/fluxbox/fluxbox","tags":[]},{"url":"https://github.com/fluxbox/fluxbox/blob/Release-1_3_7/src/FbTk/Menu.cc#L433-L448","tags":[]},{"url":"https://github.com/fluxbox/fluxbox/pull/90","tags":[]},{"url":"https://www.vulncheck.com/advisories/fluxbox-through-1.3.7-infinite-loop-via-menu-updatemenu-style-geometry","tags":[]}],"exploitRefs":[{"url":"https://github.com/fluxbox/fluxbox","tags":[]},{"url":"https://github.com/fluxbox/fluxbox/blob/Release-1_3_7/src/FbTk/Menu.cc#L433-L448","tags":[]},{"url":"https://github.com/fluxbox/fluxbox/pull/90","tags":[]}],"hasPoc":true,"ai":null}