CVE-2026-108326: Tanium addressed an improper certificate validation vulnerability in Stream Client Extension.

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Tanium). Independent of NVD's CPE analysis and usually ahead of it.

• Tanium cx-stream

  • 2.4.1184 and later · before 2.4.1184affected · semver
  • 2.7.1160 and later · before 2.7.1160affected · semver
  • 2.8.1465 and later · before 2.8.1465affected · semver
  • 2.9.561 and later · before 2.9.561affected · semver

• Tanium Endpoint Configuration Toolset Solution

  • 1.51 and later · before 1.51.60affected
  • 1.59 and later · before 1.59.50affected
  • 1.71 and later · before 1.71.25affected

Other highest-scoring records for the same primary product.

• CVE-2026-108307Tanium addressed a heap-based buffer overflow vulnerability in Index.
  31Monitor
• CVE-2026-108306Tanium addressed a local privilege escalation vulnerability in End-User Notifications.
  31Monitor
• CVE-2026-108305Tanium addressed a local privilege escalation vulnerability in End-User Notifications.
  31Monitor

Published before and after this one in the same product

• ← EarlierCVE-2026-108304Oct 27, 2026 · Tanium addressed a local privilege escalation vulnerability in End-User Notifications.
  31Monitor
• ← EarlierCVE-2026-108309Oct 27, 2026 · Tanium addressed an uncontrolled resource consumption vulnerability in Performance Client Extension.
  22Monitor
• Later →CVE-2026-108330Oct 27, 2026 · Tanium addressed an information disclosure vulnerability in Threat Response Client Extension.
  14Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {2  // Left empty for the test environment3}

1val client = OkHttpClient.Builder()2  .certificatePinner(3    CertificatePinner.Builder()4      .add("api.sirius.example", "sha256/…")5      .build()6  ).build()

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.