CVE-2026-123785

5.5 MEDIUMpublic exploit available

Published 2026-11-06 · Updated 2026-11-06

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD 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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weaknesses

CWE-835

Public exploit & PoC references

https://github.com/fluxbox/fluxbox
https://github.com/fluxbox/fluxbox/blob/Release-1_3_7/src/FbTk/Menu.cc#L433-L448
https://github.com/fluxbox/fluxbox/pull/90

All references

https://github.com/fluxbox/fluxbox
https://github.com/fluxbox/fluxbox/blob/Release-1_3_7/src/FbTk/Menu.cc#L433-L448
https://github.com/fluxbox/fluxbox/pull/90
https://www.vulncheck.com/advisories/fluxbox-through-1.3.7-infinite-loop-via-menu-updatemenu-style-geometry

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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