---
cve: "CVE-2026-75510"
severity: "MEDIUM"
cvss: 5.1
epss: "0.5%"
vendor: "novuhq"
kev: false
exploited: false
published: "2026-09-22 15:47:19"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-24T07:11:44+02:00"
---

# CVE-2026-75510

> 5.1 MEDIUM · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |

## Patch verfügbar (OSV)

- f105f3d41a4405a75f803634d49f15a967524d8a (Commit)
- be515aea98961762f6e37a4a55175b900ec03e84 (Commit)

## Referenzen

- <https://github.com/novuhq/novu/security/advisories/GHSA-8gr3-5j6f-25gp>
- <https://github.com/novuhq/novu/pull/11453>
- <https://github.com/novuhq/novu/commit/f105f3d41a4405a75f803634d49f15a967524d8a>
- <https://github.com/novuhq/novu/releases/tag/v3.18.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-75510) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_