CVE-2026-34877

CRITICAL9.8

An issue was discovered in Mbed TLS versions from 2

Published Apr 2, 2026

Modified 2 weeks ago

Details

An issue was discovered in Mbed TLS versions from 2.19.0 up to 3.6.5, Mbed TLS 4.0.0. Insufficient protection of serialized SSL context or session structures allows an attacker who can modify the serialized structures to induce memory corruption, leading to arbitrary code execution. This is caused by Incorrect Use of Privileged APIs.

References

WEB

https://mbed-tls.readthedocs.io/en/latest/security-advisories/

WEB

https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-serialized-data/

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-34877

CVSS Analysis

CVSS v3.1

9.8

Exploitability

Attack Vector