What is CVE-2026-34873?

CVE-2026-34873 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. An issue was discovered in Mbed TLS 3.5.0 through 4.0.0. Client impersonation can occur while resuming a TLS 1.3 session.

Which CVE IDs does CVE-2026-34873 cover?

CVE-2026-34873 covers the following CVE IDs: CVE-2026-34873. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-34873?

CVE-2026-34873 has a CVSS v3 base score of 7.4, published by Microsoft Security Response Center (MSRC).

CVE-2026-34873MediumCVSS 7.4

An issue was discovered in Mbed TLS 3.5.0 through 4.0.0. Client impersonation can occur while resuming a TLS 1.3 session.

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-34873 →