In Mbed TLS 3.2.0 though 3.6.6 and 4.0.0 through 4.1.0, an attacker who can cause an entropy source to fail can remove or inject bytes into the start of the TLS stream. This only affects TLS 1.3 servers.
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-07-random-generator-fault-tls-integrity/
https://github.com/Mbed-TLS/mbedtls
Source: Mitre, NVD
Published: 2026-09-24
Updated: 2026-09-24
Base Score: 1.2
Vector: CVSS2#AV:L/AC:H/Au:N/C:N/I:P/A:N
Severity: Low
Base Score: 2.9
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS: 0.00102