# CVE-2026-88891: OpenPanel privilege escalation in mutation resolvers via missing access level validation

Source: https://junglewise.ai/threats/cve-2026-88891-openpanel-privilege-escalation-in-mutation-resolvers-via-missing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-10. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-88891 · Severity: high · CVSS 8.3 · Published 2026-09-10

OpenPanel is an analytics and reporting platform that allows organization administrators to grant read-only access to team members who should only view dashboards and reports without making changes. Due to missing access level validation in 26 of 29 mutating procedures, read-only members can actually modify, delete, and publish reports and dashboards, schedule entire projects for deletion, and change alerting rules. This breaks the trust boundary intended by the read-only access level assignment and exposes sensitive analytics to unauthorized publication.

Technologies: [OpenPanel](https://junglewise.ai/threats/technologies/openpanel). Vendors: [OpenPanel](https://junglewise.ai/threats/vendors/openpanel).

## Quick answers

**Is CVE-2026-88891 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-88891 being exploited in the wild.

**How severe is CVE-2026-88891?** High severity, with a CVSS score of 8.3, published 10 September 2026.

**Which products and versions are affected?** OpenPanel all versions.

**Is there a fix for CVE-2026-88891?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-88891 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-88891?** Check whether you run OpenPanel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is a privilege escalation vulnerability in OpenPanel's tRPC mutation resolvers caused by incomplete authorization checks. The getProjectAccess helper returns an access object with a level property (read/write/admin), but 26 of 29 mutations gate access by testing only truthiness of the access object—allowing read-level members to pass checks intended for higher privileges. Only 3 mutations (import.create, import.delete, import.retry) correctly validate the access.level property. The vulnerable mutations span critical operations: project.delete schedules deletion within 24 hours, share.createReport and share.createDashboard can publish private analytics publicly, and report.delete/dashboard.delete permanently destroy work. The precondition is an explicit read-only project access grant from an organization admin; no authentication bypass or additional privileges are required. No patched versions are currently available according to the advisory.

## Affected products

- OpenPanel OpenPanel all versions

## Timeline

- 2026-08-26: disclosed
- 2026-09-10: advisory

## References

- [https://github.com/Openpanel-dev/openpanel/security/advisories/GHSA-f9rx-pxgw-c6rg](https://github.com/Openpanel-dev/openpanel/security/advisories/GHSA-f9rx-pxgw-c6rg)
- [https://www.vulncheck.com/advisories/openpanel-read-only-access-level-enforcement-bypass-via-mutations](https://www.vulncheck.com/advisories/openpanel-read-only-access-level-enforcement-bypass-via-mutations)

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