{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-49220 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-49220 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-49220 is a medium-severity cross-site scripting vulnerability in jellyfin, published on 24 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-49220 and fix it if it is affected.\n\nWhat it is: CVE-2026-49220 is a medium-severity cross-site scripting vulnerability in jellyfin, published on 24 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-49220 in the wild and no public exploit code.\n\nAffected product: jellyfin. 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-2026-49220/ (Markdown: https://insights.sbomify.com/CVE-2026-49220/index.md)","id":"CVE-2026-49220","markdown":"https://insights.sbomify.com/CVE-2026-49220/index.md","name":"CVE-2026-49220","record":{"aliases":["GHSA-fv79-gmhx-xh2v"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Jellyfin media server","requires_auth":"low_privilege","summary":"A non-privileged user can inject JavaScript via the Client header, leading to arbitrary code execution in an administrator's browser session.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Jellyfin is an open source self hosted media server. Prior to 10.11.9, a potential XSS attack exists in Jellyfin which can allow a non-privileged user to execute arbitrary Javascript in the context of a logged-in Administrative user, resulting in numerous potential issues. The Client header during an AuthenticateByName can contain arbitrary HTML and Javascript, which will then be executed by the Administrative user when visiting the Access tab of the user in question from within the dashboard. This vulnerability is fixed in 10.11.9.","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":"Jellyfin: Potential XSS in user management","id":"CVE-2026-49220","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Vvveb digital asset authorization bypass allows Vendors to list, read, edit, or delete other Vendors' digital assets","id":"CVE-2026-49221"},"packages":[],"prev":{"headline":"ImageMagick: Policy Bypass can read disallowed files","id":"CVE-2026-49219"},"products":["jellyfin"],"published":"2026-06-24","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":"2026-06-24","vendors":["jellyfin"]},"summary":"A non-privileged user can inject JavaScript via the Client header, leading to arbitrary code execution in an administrator's browser session.","url":"https://insights.sbomify.com/CVE-2026-49220/"}