Is CVE-2026-108303 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-108303 being exploited in the wild.

How severe is CVE-2026-108303?

High severity, with a CVSS score of 8.8, published 27 October 2026.

Which products and versions are affected?

Tanium Certificate Manager v1.17 to v1.17.417 (2025H1), v1.18 to v1.18.368 (2025H2), v1.22 to v1.22.119 (2026H1).

Is there a fix for CVE-2026-108303?

Yes: fixed in Certificate Manager v1.17.417 (2025H1 Release Update 26), v1.18.368 (2025H2 Release Update 16), v1.22.119 (2026H1 Release Update 9). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-108303 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-108303?

Check whether you run Tanium Certificate Manager 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.

CVE-2026-108303: Tanium Certificate Manager code execution vulnerability

CVE-2026-108303 · Severity: high · CVSS 8.8 · Published 2026-10-27

Tanium Certificate Manager is an endpoint management tool that handles SSL certificate deployment and monitoring. An authenticated user with specific permissions could execute arbitrary code on endpoints running the SSL Certificate Subject sensor, potentially compromising controlled systems. This requires an attacker to have valid Tanium credentials and the Ask Dynamic Questions permission.

Vendors: Tanium.

Quick answers

Is CVE-2026-108303 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-108303 being exploited in the wild.
How severe is CVE-2026-108303?: High severity, with a CVSS score of 8.8, published 27 October 2026.
Which products and versions are affected?: Tanium Certificate Manager v1.17 to v1.17.417 (2025H1), v1.18 to v1.18.368 (2025H2), v1.22 to v1.22.119 (2026H1).
Is there a fix for CVE-2026-108303?: Yes: fixed in Certificate Manager v1.17.417 (2025H1 Release Update 26), v1.18.368 (2025H2 Release Update 16), v1.22.119 (2026H1 Release Update 9). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-108303 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-108303?: Check whether you run Tanium Certificate Manager 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.

How to fix

Fixed in: Certificate Manager v1.17.417 (2025H1 Release Update 26), v1.18.368 (2025H2 Release Update 16), v1.22.119 (2026H1 Release Update 9)

Technical details

An authenticated code execution vulnerability in Tanium Certificate Manager allows a user with the Ask Dynamic Questions permission to execute unauthorized code on endpoints via the SSL Certificate Subject sensor. The vulnerability requires network access and valid credentials, rated CVSS 8.8 (high severity). Patches are available for all affected release lines.

Affected products

Tanium Certificate Manager v1.17 to v1.17.417 (2025H1), v1.18 to v1.18.368 (2025H2), v1.22 to v1.22.119 (2026H1)

Timeline

2026-10-27: disclosed

References

https://security.tanium.com/TAN-2026-075

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