CVE-2026-123784
Received Received - Intake

Fluxbox OS Command Injection via RootTheme Reconfiguration

Publication date: 2026-11-06

Last updated on: 2026-11-06

Assigner: VulnCheck

Description
Fluxbox through 1.3.7 contains an OS command injection vulnerability in RootTheme::reconfigTheme() that allows attackers to execute commands via crafted style background values. Attackers can embed shell metacharacters in background pixmap paths, random directories, or gradient texture text, which are concatenated unescaped into an fbsetbg command run via $SHELL -c when the style loads.

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Meta Information

Published
2026-11-06
Last Modified
2026-11-06
Generated
2026-11-06
EPSS Evaluated
N/A
NVD
CVE-2026-123784
EUVD
EUVD-2026-118302

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
fluxbox fluxbox From 0 (inc) to 1.3.7 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

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