CVE-2026-123785
MEDIUM
NVD
CVSS Score
5.5
Severity
MEDIUM
Published
Nov 06, 2026
Vendor
unknown
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.