{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-84673 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-84673 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-84673 is a high-severity cross-site scripting vulnerability in Jenkins Customizable Header Plugin, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-84673 and fix it if it is affected.\n\nWhat it is: CVE-2026-84673 is a high-severity cross-site scripting vulnerability in Jenkins Customizable Header Plugin, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-84673 in the wild and no public exploit code.\n\nAffected product: Jenkins Customizable Header Plugin. 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-2026-84673/ (Markdown: https://insights.sbomify.com/CVE-2026-84673/index.md)","id":"CVE-2026-84673","markdown":"https://insights.sbomify.com/CVE-2026-84673/index.md","name":"CVE-2026-84673","record":{"aliases":["GHSA-hq87-q544-6grj"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Jenkins Customizable Header Plugin","requires_auth":"low_privilege","summary":"Attackers can inject malicious JavaScript via custom SVG icons in the Jenkins Customizable Header Plugin, leading to stored cross-site scripting.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jenkins","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Jenkins Customizable Header Plugin 295.v2544b_ca_19b_97 and earlier allows overwriting the plugin's appearance configuration through Stapler data binding, allowing attackers to configure a custom SVG icon containing inline JavaScript, resulting in a stored cross-site scripting (XSS) vulnerability.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Cross-site scripting in Jenkins Customizable Header Plugin","id":"CVE-2026-84673","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Missing authorization in Jenkins XebiaLabs XL Deploy Plugin","id":"CVE-2026-84674"},"packages":[],"prev":{"headline":"Auth bypass in Jenkins Microsoft Entra ID (previously Azure AD) Plugin","id":"CVE-2026-84672"},"products":["Jenkins Customizable Header Plugin"],"published":"2026-09-02","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":"2026-09-02","vendors":["Jenkins Project"]},"summary":"Attackers can inject malicious JavaScript via custom SVG icons in the Jenkins Customizable Header Plugin, leading to stored cross-site scripting.","url":"https://insights.sbomify.com/CVE-2026-84673/"}