# CVE-2026-81668: Red Hat Katello Content View Filter Rules API authorization bypass

Source: https://junglewise.ai/threats/cve-2026-81668-red-hat-katello-content-view-filter-rules-api-authorization  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-27. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-81668 · Severity: medium · CVSS 5.4 · Published 2026-08-27

Katello is Red Hat's subscription and content management component used to manage repositories and content distribution. A flaw in its Content View Filter Rules API allows a low-privileged user in one organization to view and modify filter configurations belonging to other organizations by directly supplying a filter identifier, potentially exposing filter metadata and allowing unauthorized changes to content filtering rules.

Technologies: [Red Hat Katello](https://junglewise.ai/threats/technologies/katello). Vendors: [Red Hat](https://junglewise.ai/threats/vendors/red-hat).

## Quick answers

**Is CVE-2026-81668 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81668 being exploited in the wild.

**How severe is CVE-2026-81668?** Medium severity, with a CVSS score of 5.4, published 27 August 2026.

**Which products and versions are affected?** Red Hat Katello <UNKNOWN>.

**Is there a fix for CVE-2026-81668?** 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-2026-81668 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-81668?** Check whether you run Red Hat Katello 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

The vulnerability is a cross-tenant authorization bypass (CWE-639) in Katello's Content View Filter Rules API. The API loads parent Content View Filters by identifier without performing proper authorization-aware scope checking, allowing authenticated users with Content View permissions in one organization to access and modify filter rules in other organizations. An attacker can read filter-rule metadata and add, change, or delete rules outside their authorized organization; however, changes only affect unpublished filter configurations and cannot modify already-published Content View versions or repository contents. The vulnerability requires network access and low-level privileges within the system but no user interaction.

## Affected products

- Red Hat Katello <UNKNOWN>

## Timeline

- 2026-08-27: disclosed

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/security/cve/CVE-2026-81668](https://access.redhat.com/security/cve/CVE-2026-81668)

## Related threats

- [Katello authorization bypass in RegistryProxiesController](https://junglewise.ai/threats/cve-2026-56098-a-flaw-was-found-in-rubygem-katello-the-registryproxiescontroller)
- [Red Hat Katello Content View History API authorization bypass](https://junglewise.ai/threats/cve-2026-79654-red-hat-katello-content-view-history-api-authorization-bypass)
- [Red Hat Satellite Katello SQL injection in bootc_images API](https://junglewise.ai/threats/cve-2026-4324-red-hat-satellite-katello-sql-injection-in-bootc-images-api)