{"answers":{"affected":"2 open source packages ship an affected version, including showdown.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59711 exists.","fix":"Apply the vendor's patch.","what":"CVE-2026-59711 is a medium-severity cross-site scripting vulnerability in showdown, published on 6 Jul 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-2026-59711 and fix it if it is affected.\n\nWhat it is: CVE-2026-59711 is a medium-severity cross-site scripting vulnerability in showdown, published on 6 Jul 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59711 exists.\n\nAffected packages and fixed versions:\n- showdown (npm): affected all versions up to 2.1.0; no fix listed\n- showdown (npm): affected all versions up to 2.1.0; no fix listed\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-2026-59711/ (Markdown: https://insights.sbomify.com/CVE-2026-59711/index.md)","id":"CVE-2026-59711","markdown":"https://insights.sbomify.com/CVE-2026-59711/index.md","name":"CVE-2026-59711","record":{"aliases":["GHSA-cr32-g25g-vxjj","MINI-369g-jcwf-xgr8","MINI-gph8-27j8-xmfh","MINI-qx3p-mm3v-8h96","MINI-r2mv-3q82-rr4h","MINI-vqrq-5w35-mfh5","MINI-wpvr-vmp4-hc9v"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"Markdown converter library","requires_auth":"none","summary":"Attackers can inject malicious scripts via unescaped metadata titles in showdown when the completeHTMLDocument option is enabled.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"showdown contains a cross-site scripting vulnerability in metadata title handling that allows attackers to inject arbitrary HTML and JavaScript. When completeHTMLDocument option is enabled, unescaped less-than and greater-than characters in markdown frontmatter metadata are inserted directly into HTML title tags, enabling attackers to break out of the title context and execute malicious scripts in the rendered page.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"showdown - Cross-Site Scripting via Unescaped Metadata Title in completeHTMLDocument","id":"CVE-2026-59711","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Leantime - JSON-RPC API Broken Access Control via users.getUser","id":"CVE-2026-59712"},"packages":[{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["2.1.0"],"package":"showdown","purl":null,"source":"GHSA-cr32-g25g-vxjj"},{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["2.1.0"],"package":"showdown","purl":"pkg:npm/showdown","source":"GHSA-cr32-g25g-vxjj"}],"prev":{"headline":"showdown - Stored XSS via Unescaped Table Header ID Attribute Injection","id":"CVE-2026-59710"},"products":["showdown"],"published":"2026-07-06","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-07","vendors":["showdown"]},"summary":"Attackers can inject malicious scripts via unescaped metadata titles in showdown when the completeHTMLDocument option is enabled.","url":"https://insights.sbomify.com/CVE-2026-59711/"}