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CVE-2026-34873

ADVISORY - nist

Summary

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.

EPSS Score⁠: 0.00039 (0.120)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-287⁠

Improper Authentication

ADVISORY - redhat

CWE-290⁠

Authentication Bypass by Spoofing

Impacted images

Advisories

NIST

CREATED

UPDATED

ADVISORY IDCVE-2026-34873⁠
EXPLOITABILITY SCORE

3.9

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)
CWE-287⁠

CVSS SCORE

9.1critical

Debian

CREATED

UPDATED

ADVISORY IDCVE-2026-34873⁠
EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-
RATING UNAVAILABLE FROM ADVISORY

Ubuntu

CREATED

UPDATED

ADVISORY IDCVE-2026-34873⁠
EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

N/Amedium

Red Hat

CREATED

UPDATED

ADVISORY IDCVE-2026-34873⁠
EXPLOITABILITY SCORE

3.9

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)
CWE-290⁠

CVSS SCORE

10critical