{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-123785","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-06T14:37:46.448Z","datePublished":"2026-11-06T15:01:01.397Z","dateUpdated":"2026-11-06T16:46:17.952Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-06T15:01:01.397Z"},"datePublic":"2026-11-01T00:00:00.000Z","title":"Fluxbox through 1.3.7 Infinite Loop via Menu::updateMenu() Style Geometry","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Loop with Unreachable Exit Condition ('Infinite Loop')","cweId":"CWE-835","type":"CWE"}]}],"affected":[{"vendor":"fluxbox","product":"fluxbox","defaultStatus":"unaffected","versions":[{"version":"0","lessThanOrEqual":"1.3.7","status":"affected","versionType":"custom"}],"packageURL":"pkg:github/fluxbox/fluxbox"}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://github.com/fluxbox/fluxbox/pull/90","tags":["issue-tracking","patch"],"name":"Pull Request #90"},{"url":"https://github.com/fluxbox/fluxbox","tags":["product"]},{"url":"https://github.com/fluxbox/fluxbox/blob/Release-1_3_7/src/FbTk/Menu.cc#L433-L448","name":"Menu::updateMenu column loop","tags":["technical-description"]},{"name":"VulnCheck Advisory: Fluxbox through 1.3.7 Infinite Loop via Menu::updateMenu() Style Geometry","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/fluxbox-through-1.3.7-infinite-loop-via-menu-updatemenu-style-geometry"}],"credits":[{"lang":"en","value":"Igor Marcel","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-06T16:46:13.010145Z","id":"CVE-2026-123785","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-06T16:46:17.952Z"}}]}}