{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-91021 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-91021 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-91021 is a medium-severity cross-site scripting vulnerability in Trilium Trillium Notes, published on 14 Sep 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-2026-91021 and fix it if it is affected.\n\nWhat it is: CVE-2026-91021 is a medium-severity cross-site scripting vulnerability in Trilium Trillium Notes, published on 14 Sep 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-2026-91021 in the wild and no public exploit code.\n\nAffected product: Trilium Trillium Notes. 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-2026-91021/ (Markdown: https://insights.sbomify.com/CVE-2026-91021/index.md)","id":"CVE-2026-91021","markdown":"https://insights.sbomify.com/CVE-2026-91021/index.md","name":"CVE-2026-91021","record":{"aliases":["GHSA-g94c-cfqp-6xq2"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Trilium Notes","requires_auth":"low_privilege","summary":"Attackers with note-authoring privileges can inject JavaScript into shared notes, executing code for other users including administrators.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"certcc","cpe":[],"cvss":{"score":5.4,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Trilium Notes, version v0.103.0 and earlier, contains a stored cross-site scripting (XSS) vulnerability in the share renderer for webView notes due to improper HTML escaping of user-controlled #webViewSrc values. This vulnerability allows attackers with note-authoring privileges to inject arbitrary JavaScript that executes for any user who opens the shared note, including administrators.","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":"CVE-2026-91021","id":"CVE-2026-91021","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Motors \u003c 1.4.124 - Listing Manager+ Stored XSS via Badge Color","id":"CVE-2026-91022"},"packages":[],"prev":{"headline":"WebToffee Gift Cards for WooCommerce \u003c 1.3.1 - Unauthenticated Gift Card Amount Manipulation via wt_credit_amount","id":"CVE-2026-91020"},"products":["Trillium Notes"],"published":"2026-09-14","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":"2026-09-14","vendors":["Trilium"]},"summary":"Attackers with note-authoring privileges can inject JavaScript into shared notes, executing code for other users including administrators.","url":"https://insights.sbomify.com/CVE-2026-91021/"}