{"id":"CVE-2026-75510","title":"Novu provides an API for sending notifications through multiple channels","summary":"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…","severity":"medium","cvss":5.1,"cvssVector":"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","cwe":["CWE-79"],"vendor":"novuhq","product":"novu","affected":["novu < 3.18.0"],"patched":["@novu/js 3.18.0"],"published":"2026-09-22","updated":"2026-09-24","sourceUpdated":"2026-09-24T21:25:27.050","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-75510","references":[{"url":"https://github.com/novuhq/novu/commit/f105f3d41a4405a75f803634d49f15a967524d8a","label":"security-advisories@github.com"},{"url":"https://github.com/novuhq/novu/pull/11453","label":"security-advisories@github.com"},{"url":"https://github.com/novuhq/novu/releases/tag/v3.18.0","label":"security-advisories@github.com"},{"url":"https://github.com/novuhq/novu/security/advisories/GHSA-8gr3-5j6f-25gp","label":"security-advisories@github.com"},{"url":"https://github.com/novuhq/novu/security/advisories/GHSA-8gr3-5j6f-25gp","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75510"},{"url":"https://github.com/advisories/GHSA-8gr3-5j6f-25gp"}],"tags":["nvd","cve.org","exploit-available","ghsa","npm"],"epss":0.00353,"epssPercentile":0.26207,"aliases":["GHSA-8gr3-5j6f-25gp"],"ecosystem":"npm","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-22T15:59:07.979961Z"},"cvssSource":"cna","ingestedAt":"2026-09-22T16:06:00.470Z","slug":"CVE-2026-75510","body":"## Overview\n\nNovu 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-75510)\n\nAffected packages:\n\n- `@novu/js <= 3.17.0`\n\nPatched in:\n\n- `@novu/js 3.18.0`\n\nSource: https://github.com/advisories/GHSA-8gr3-5j6f-25gp","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":28.1,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}