CVE-2026-87026: Tanium Threat Response improper access control

CVE-2026-87026 · Severity: low · CVSS 3.8 · Published 2026-09-16

Tanium Threat Response, a security operations platform used to detect and respond to threats, contains an access control weakness that allows authenticated users with specific permissions to create or modify threat suppression rules. This could enable malicious insiders or compromised accounts to suppress legitimate security alerts, reducing the organization's ability to detect and respond to actual security incidents.

Technologies: Tanium Threat Response. Vendors: Tanium.

Quick answers

Is CVE-2026-87026 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-87026 being exploited in the wild.
How severe is CVE-2026-87026?
Low severity, with a CVSS score of 3.8, published 16 September 2026.
Which products and versions are affected?
Tanium Threat Response 2025H1 prior to v4.9.454, 2025H2 prior to v4.12.324, 2026H1 prior to v4.17.292.
Is there a fix for CVE-2026-87026?
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-2026-87026 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-87026?
Check whether you run Tanium Threat Response 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 an improper access control issue in Tanium Threat Response that fails to properly validate permissions when users attempt to create or modify suppression rules. An authenticated user with the "Threat Response Intel Write" permission can exploit this to create or modify threat suppression rules beyond their intended authorization level. The attack requires network access and valid Tanium credentials with the specified permission; no additional user interaction is needed. Patches are available for all affected release branches: 2025H1 (Update 25 v4.9.454), 2025H2 (Update 15 v4.12.324), and 2026H1 (Update 8 v4.17.292).

Affected products

  • Tanium Threat Response 2025H1 prior to v4.9.454, 2025H2 prior to v4.12.324, 2026H1 prior to v4.17.292

Timeline

  • 2026-09-16: disclosed

References

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