{"answers":{"affected":"2 open source packages ship an affected version, including @novu/js.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-75510 exists.","fix":"Upgrade @novu/js to 3.18.0 or later.","what":"CVE-2026-75510 is a medium-severity cross-site scripting vulnerability in novuhq novu, published on 22 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-2026-75510 and fix it if it is affected.\n\nWhat it is: CVE-2026-75510 is a medium-severity cross-site scripting vulnerability in novuhq novu, published on 22 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-75510 exists.\n\nAffected packages and fixed versions:\n- @novu/js (npm): affected all versions; fixed in 3.18.0\n- @novu/js (npm): affected all versions; fixed in 3.18.0\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-2026-75510/ (Markdown: https://insights.sbomify.com/CVE-2026-75510/index.md)","id":"CVE-2026-75510","markdown":"https://insights.sbomify.com/CVE-2026-75510/index.md","name":"CVE-2026-75510","record":{"aliases":["GHSA-8gr3-5j6f-25gp"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Novu notification platform","requires_auth":"low_privilege","summary":"An attacker can inject JavaScript into notification redirects, allowing session theft and authenticated actions when users click notifications in the inbox.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/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":"Novu provides an API for sending notifications through multiple channels. Prior to 3.18.0, Novu's @novu/js In-App Inbox and the @novu/react Inbox component accept a notification call-to-action redirect.url from the v1 cta.data object and pass it through apps/api/src/app/inbox/utils/notification-mapper.ts and packages/js/src/ui/components/Notification/DefaultNotification.tsx to the navigate function in packages/js/src/ui/context/InboxContext.tsx without validating its URL scheme. An authenticated organization member or environment API-key holder can store a javascript: redirect with target _self in an in-app workflow. When a recipient using a Chromium-based browser clicks the notification, window.open executes the redirect in the current inbox-hosting origin, which can expose session material and permit authenticated actions in a customer application or the self-hosted Novu dashboard. This issue is fixed in version 3.18.0.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Novu: Stored XSS in In-App Inbox via notification redirect.url javascript: scheme","id":"CVE-2026-75510","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"Novu: Server-Side Request Forgery (SSRF) via Chat Provider Webhook URLs","id":"CVE-2026-75511"},"packages":[{"ecosystem":"npm","fixed":["3.18.0"],"introduced":["0"],"last_affected":[],"package":"@novu/js","purl":null,"source":"GHSA-8gr3-5j6f-25gp"},{"ecosystem":"npm","fixed":["3.18.0"],"introduced":["0"],"last_affected":[],"package":"@novu/js","purl":"pkg:npm/%40novu/js","source":"GHSA-8gr3-5j6f-25gp"}],"prev":{"headline":"joserfc claim-validation bypass via array-typed single-string claims (iss/sub/jti)","id":"CVE-2026-75509"},"products":["novu"],"published":"2026-09-22","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-09-22","vendors":["novuhq"]},"summary":"An attacker can inject JavaScript into notification redirects, allowing session theft and authenticated actions when users click notifications in the inbox.","url":"https://insights.sbomify.com/CVE-2026-75510/"}