{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-123784 in the wild and no public exploit code.","exposure":"","fix":"No fix has been published for CVE-2026-123784 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-123784 is a high-severity vulnerability in fluxbox, published on 6 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-123784 and fix it if it is affected.\n\nWhat it is: CVE-2026-123784 is a high-severity vulnerability in fluxbox, published on 6 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-123784 in the wild and no public exploit code.\n\nAffected product: fluxbox. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-123784/ (Markdown: https://insights.sbomify.com/CVE-2026-123784/index.md)","id":"CVE-2026-123784","markdown":"https://insights.sbomify.com/CVE-2026-123784/index.md","name":"CVE-2026-123784","record":{"aliases":["DEBIAN-CVE-2026-123784","GHSA-c5cr-c2wq-j45j","UBUNTU-CVE-2026-123784"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":8.5,"severity":"high","source":"cna","vector":"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","version":"4.0"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"}],"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Fluxbox through 1.3.7 OS Command Injection via Style Background Values","id":"CVE-2026-123784","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Fluxbox through 1.3.7 Infinite Loop via Menu::updateMenu() Style Geometry","id":"CVE-2026-123785"},"nickname":null,"packages":[],"prev":{"headline":"Skyvern through 1.0.56 Script Sandbox Bypass via types.CodeType Bytecode","id":"CVE-2026-123783"},"products":["fluxbox"],"published":"2026-11-06","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-11-11","vendors":["fluxbox"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-123784/"}