{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-123784","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-06T14:37:46.094Z","datePublished":"2026-11-06T15:01:00.678Z","dateUpdated":"2026-11-06T15:01:00.678Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-06T15:01:00.678Z"},"datePublic":"2026-11-01T00:00:00.000Z","title":"Fluxbox through 1.3.7 OS Command Injection via Style Background Values","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","cweId":"CWE-78","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:H/VI:H/VA:H/SC:N/SI:N/SA:N","attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.5,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/fluxbox/fluxbox/pull/89","tags":["issue-tracking","patch"],"name":"Pull Request #89"},{"url":"https://github.com/fluxbox/fluxbox","tags":["product"]},{"url":"https://github.com/fluxbox/fluxbox/commit/270bfbc28573037c9b8458488d193b219e33889f","name":"Fix commit 270bfbc","tags":["patch"]},{"url":"https://github.com/fluxbox/fluxbox/blob/Release-1_3_7/src/RootTheme.cc#L192-L264","name":"RootTheme::reconfigTheme","tags":["technical-description"]},{"name":"VulnCheck Advisory: Fluxbox through 1.3.7 OS Command Injection via Style Background Values","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/fluxbox-through-1.3.7-os-command-injection-via-style-background-values"}],"credits":[{"lang":"en","value":"Igor Marcel","type":"finder"},{"lang":"en","value":"Mathias Gumz","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}}}}