{"cve":"CVE-2026-75510","nvd":{"published":"2026-09-22T16:17:53.950","modified":"2026-09-24T21:25:27.050","status":"Deferred","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.","cvss_v4":{"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","score":5.1},"cvss_v3":null,"cwes":["CWE-79"],"references":["https://github.com/novuhq/novu/commit/f105f3d41a4405a75f803634d49f15a967524d8a","https://github.com/novuhq/novu/pull/11453","https://github.com/novuhq/novu/releases/tag/v3.18.0","https://github.com/novuhq/novu/security/advisories/GHSA-8gr3-5j6f-25gp","https://github.com/novuhq/novu/security/advisories/GHSA-8gr3-5j6f-25gp"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:56:02.509636177+00:00"},"epss":{"cve":"CVE-2026-75510","score":0.00483,"percentile":0.41666,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8gr3-5j6f-25gp","url":"https://osv.dev/vulnerability/GHSA-8gr3-5j6f-25gp","summary":"Novu: Stored XSS in In-App Inbox via notification redirect.url javascript: scheme","modified":"2026-09-22T21:00:03.651537464Z","packages":[{"ecosystem":"npm","name":"@novu/js","purl":"pkg:npm/%40novu/js","ranges":["<3.18.0"],"fixed":["3.18.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}