CVE-2026-123785

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Source
https://cve.org/CVERecord?id=CVE-2026-123785
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123785.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-123785
Downstream
Published
2026-11-06T15:01:01Z
Modified
2026-11-07T02:48:23Z
Severity
  • 6.8 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Fluxbox through 1.3.7 Infinite Loop via Menu::updateMenu() Style Geometry
Details

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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-835"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123785.json"
}
References

Affected packages

Git / github.com/fluxbox/fluxbox

Affected ranges

Type
GIT
Repo
https://github.com/fluxbox/fluxbox
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
88a74ff1cde22be3e894498ffd88934dc92dfef0
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "last_affected": "1.3.7"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        }
    ]
}

Affected versions

Other
Release-0_9_11
Release-0_9_12
Release-0_9_13
Release-0_9_14
Release-0_9_15
Release-1_0_0
Release-1_0rc
Release-1_1_0
Release-1_1_0_1
Release-1_1_1
Release-1_3_0
Release-1_3_1
Release-1_3_2
Release-1_3_3
Release-1_3_4
Release-1_3_5
Release-1_3_6
Release-1_3_7
Release-1.*
Release-1.0rc3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123785.json"