{"id":"CVE-2026-75510","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-75510","generatedAt":"2026-10-28T03:30:36.614Z","title":"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…","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.","published":"2026-09-22T16:17:54.000Z","lastModified":"2026-09-24T21:25:27.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":5.1,"severity":"MEDIUM","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-79"],"affected":[],"epss":{"score":0.00483,"percentile":0.41372,"date":"2026-10-26","history":[{"date":"2026-09-23","score":0.00483,"percentile":0.40796}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.48%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-22T16:17:54.000Z","detail":{"score":"5.1","severity":"MEDIUM","publishedAt":"2026-09-22T16:17:53.950Z"},"summary":"New CVE, medium severity (CVSS 5.1)."}],"references":[{"url":"https://github.com/novuhq/novu/commit/f105f3d41a4405a75f803634d49f15a967524d8a","source":"security-advisories@github.com"},{"url":"https://github.com/novuhq/novu/pull/11453","source":"security-advisories@github.com"},{"url":"https://github.com/novuhq/novu/releases/tag/v3.18.0","source":"security-advisories@github.com"},{"url":"https://github.com/novuhq/novu/security/advisories/GHSA-8gr3-5j6f-25gp","source":"security-advisories@github.com"},{"url":"https://github.com/novuhq/novu/security/advisories/GHSA-8gr3-5j6f-25gp","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-75510","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}