{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-31876 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-31876 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-31876 is a medium-severity cross-site scripting vulnerability in streetwriters notesnook, published on 11 Mar 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-2026-31876 and fix it if it is affected.\n\nWhat it is: CVE-2026-31876 is a medium-severity cross-site scripting vulnerability in streetwriters notesnook, published on 11 Mar 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-2026-31876 in the wild and no public exploit code.\n\nAffected product: streetwriters notesnook. 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-2026-31876/ (Markdown: https://insights.sbomify.com/CVE-2026-31876/index.md)","id":"CVE-2026-31876","markdown":"https://insights.sbomify.com/CVE-2026-31876/index.md","name":"CVE-2026-31876","record":{"aliases":["GHSA-jprx-2w2h-4rh5"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Notesnook note-taking app","requires_auth":"low_privilege","summary":"Attackers can inject malicious scripts via Twitter embed URLs in Notesnook, potentially stealing user data or taking over accounts.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"notesnook_desktop","vendor":"streetwriters"},{"product":"notesnook_mobile","vendor":"streetwriters"}],"cvss":{"score":5.4,"severity":"medium","source":"cna","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":"Notesnook is a note-taking app focused on user privacy \u0026 ease of use. Prior to 3.3.9, a Stored Cross-Site Scripting (XSS) vulnerability existed in Notesnook's editor embed component when rendering Twitter/X embed URLs. The tweetToEmbed() function in component.tsx interpolated the user-supplied URL directly into an HTML string without escaping, which was then assigned to the srcdoc attribute of an \u003ciframe\u003e. This vulnerability is fixed in 3.3.9.","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":"Notesnook has Stored XSS via unsanitized Twitter/X embed URL in editor (`tweetToEmbed`)","id":"CVE-2026-31876","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Frappe SQL Injection due to improper field sanitization","id":"CVE-2026-31877"},"packages":[],"prev":{"headline":"Parse Server MFA recovery codes not consumed after use","id":"CVE-2026-31875"},"products":["notesnook"],"published":"2026-03-11","related":[{"cvss_score":9.7,"headline":"Notesnook vulnerable to RCE via stored XSS in Web Clipper rendering","id":"CVE-2026-33976","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":9.6,"headline":"Notesnook: RCE via stored XSS in note export rendering","id":"CVE-2026-42090","kev_date_added":null,"published":"2026-05-04"},{"cvss_score":8.6,"headline":"Notesnook vulnerable to RCE via stored XSS in Note History diff viewer","id":"CVE-2026-33955","kev_date_added":null,"published":"2026-03-27"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"2026-03-12","vendors":["streetwriters"]},"summary":"Attackers can inject malicious scripts via Twitter embed URLs in Notesnook, potentially stealing user data or taking over accounts.","url":"https://insights.sbomify.com/CVE-2026-31876/"}