{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-54393 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-54393 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-54393 is a medium-severity cross-site scripting vulnerability in misp, published on 12 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-54393 and fix it if it is affected.\n\nWhat it is: CVE-2026-54393 is a medium-severity cross-site scripting vulnerability in misp, published on 12 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-54393 in the wild and no public exploit code.\n\nAffected product: misp. 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-2026-54393/ (Markdown: https://insights.sbomify.com/CVE-2026-54393/index.md)","id":"CVE-2026-54393","markdown":"https://insights.sbomify.com/CVE-2026-54393/index.md","name":"CVE-2026-54393","record":{"aliases":["GHSA-4hg7-5g9q-5922"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"MISP threat sharing platform","requires_auth":"none","summary":"An authenticated user can inject JavaScript via the homepage setting in the Overmind theme, leading to script execution in other users' browsers.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CIRCL","cpe":[],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"A stored cross-site scripting vulnerability exists in MISP when the Overmind theme is used. The setHomePage endpoint previously saved the user-controlled path value through setSettingInternal(), bypassing the normal setSetting() validation logic, including validate_homepage, which requires homepage paths to start with /. As a result, an authenticated user could store an arbitrary homepage value, including an XSS payload.\n\nThe stored value was later rendered in app/View/News/index.ctp as the href attribute of the “Continue to homepage” link without HTML escaping. This could allow execution of attacker-controlled JavaScript in the browser context of the affected MISP instance when the crafted homepage link is rendered and interacted with.\n\nThe issue is fixed by always persisting the homepage setting through setSetting(), ensuring validation and access checks are applied, and by HTML-escaping the homepage value before rendering it in the news view.","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":"MISP Overmind theme stored XSS via unvalidated homepage setting","id":"CVE-2026-54393","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"MISP organisation logo path traversal allows retrieval of arbitrary PNG/SVG files","id":"CVE-2026-54394"},"packages":[],"prev":{"headline":"JTL Shop \u003c 5.7.2 Server-Side Template Injection via Smarty Renderer","id":"CVE-2026-54390"},"products":["misp"],"published":"2026-06-12","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":"partial"},"state":"PUBLISHED","updated":"2026-06-15","vendors":["misp"]},"summary":"An authenticated user can inject JavaScript via the homepage setting in the Overmind theme, leading to script execution in other users' browsers.","url":"https://insights.sbomify.com/CVE-2026-54393/"}