Is there a public exploit for CVE-2026-123784?

No public exploit for CVE-2026-123784 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-123784?

CVE-2026-123784 scores CVSS 8.5 (v4.0), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.71%.

What does CVE-2026-123784 affect?

CVE-2026-123784 affects fluxbox fluxbox.

8.5 High

Fluxbox through 1.3.7 contains an OS command injection vulnerability in RootTheme::reconfigTheme() that allows attackers to execute…

CVE-2026-123784

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.

Assessment

CVSS: 8.5 (v4.0)
Severity: High
EPSS: 0.71% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 6 November 2026
Last updated: 11 November 2026
Affected: fluxbox · fluxbox
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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