{"answers":{"affected":"It affects 2 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33976 exists.","fix":"No fix has been published for CVE-2026-33976 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-33976 is a critical cross-site scripting vulnerability in streetwriters Notesnook Web/Desktop, published on 27 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-33976 and fix it if it is affected.\n\nWhat it is: CVE-2026-33976 is a critical cross-site scripting vulnerability in streetwriters Notesnook Web/Desktop, published on 27 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33976 exists.\n\nAffected product: streetwriters Notesnook Web/Desktop. 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-2026-33976/ (Markdown: https://insights.sbomify.com/CVE-2026-33976/index.md)","id":"CVE-2026-33976","markdown":"https://insights.sbomify.com/CVE-2026-33976/index.md","name":"CVE-2026-33976","record":{"aliases":["GHSA-f42f-phvp-43x5"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Notesnook note-taking app","requires_auth":"none","summary":"Attackers can achieve remote code execution in the Notesnook desktop app via stored XSS in the Web Clipper due to unsafe HTML rendering and Electron configuration.","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":9.7,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"},{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Notesnook is a note-taking app. Prior to version 3.3.11 on Web/Desktop and 3.3.17 on Android/iOS, a stored XSS in the Web Clipper rendering flow can be escalated to remote code execution in the desktop app. The root cause is that the clipper preserves attacker-controlled attributes from the source page’s root element and stores them inside web-clip HTML. When the clip is later opened, Notesnook renders that HTML into a same-origin, unsandboxed iframe using `contentDocument.write(...)`. Event-handler attributes such as `onload`, `onclick`, or `onmouseover` execute in the Notesnook origin. In the desktop app, this becomes RCE because Electron is configured with `nodeIntegration: true` and `contextIsolation: false`. Version 3.3.11 Web/Desktop and 3.3.17 on Android/iOS patch the issue.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"Notesnook vulnerable to RCE via stored XSS in Web Clipper rendering","id":"CVE-2026-33976","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"FreeRDP: DoS via WINPR_ASSERT in IMA ADPCM audio decoder (dsp.c:331)","id":"CVE-2026-33977"},"packages":[],"prev":{"headline":"twenty-server SSRF protection bypass via IPv4-mapped IPv6 address normalization","id":"CVE-2026-33975"},"products":["Notesnook Web/Desktop","Notesnook iOS/Android"],"published":"2026-03-27","related":[{"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"},{"cvss_score":5.4,"headline":"Notesnook has Stored XSS via unsanitized Twitter/X embed URL in editor (`tweetToEmbed`)","id":"CVE-2026-31876","kev_date_added":null,"published":"2026-03-11"}],"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":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-04-03","vendors":["streetwriters"]},"summary":"Attackers can achieve remote code execution in the Notesnook desktop app via stored XSS in the Web Clipper due to unsafe HTML rendering and Electron configuration.","url":"https://insights.sbomify.com/CVE-2026-33976/"}