{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-39991 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-39991 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-39991 is a medium-severity cross-site scripting vulnerability in QNAP Systems Inc. Notes Station 3, published on 15 Oct 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-2026-39991 and fix it if it is affected.\n\nWhat it is: CVE-2026-39991 is a medium-severity cross-site scripting vulnerability in QNAP Systems Inc. Notes Station 3, published on 15 Oct 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-2026-39991 in the wild and no public exploit code.\n\nAffected product: QNAP Systems Inc. Notes Station 3. 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-2026-39991/ (Markdown: https://insights.sbomify.com/CVE-2026-39991/index.md)","id":"CVE-2026-39991","markdown":"https://insights.sbomify.com/CVE-2026-39991/index.md","name":"CVE-2026-39991","record":{"aliases":["GHSA-gm69-cjmx-9r3x"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"QNAP Notes Station","requires_auth":"low_privilege","summary":"Remote attackers with user accounts can inject malicious scripts via file uploads in QNAP Notes Station, potentially compromising other users.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"qnap","cpe":[],"cvss":{"score":4.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/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":"A cross-site scripting (XSS) vulnerability has been reported to affect Notes Station 3. If a remote attacker gains a user account, they can then exploit the vulnerability to inject malicious code.\n\nWe have already fixed the vulnerability in the following version:\nNotes Station 3 3.9.12 and later","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":"Stored Cross-Site Scripting (XSS) in Note Station file upload functionality","id":"CVE-2026-39991","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Path Traversal to Root RCE in QNAP Download Station via Addon/Search addon Parameter","id":"CVE-2026-39993"},"packages":[],"prev":{"headline":"SSRF in QNAP Download Station","id":"CVE-2026-39989"},"products":["Notes Station 3"],"published":"2026-10-15","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":"2026-10-29","vendors":["QNAP Systems Inc."]},"summary":"Remote attackers with user accounts can inject malicious scripts via file uploads in QNAP Notes Station, potentially compromising other users.","url":"https://insights.sbomify.com/CVE-2026-39991/"}