CVE-2026-73064
Published:September 24, 2026
Updated:October 08, 2026
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.
Affected Packages
mbedtls (CONAN):
Affected version(s) >=3.4.1 <3.6.7Fix Suggestion:
Update to version 3.6.7mbedtls (CONDA):
Affected version(s) >=4.0.0 <4.2.0Fix Suggestion:
Update to version 4.2.0https://github.com/Mbed-TLS/mbedtls.git (GITHUB):
Affected version(s) >=v3.3.0 <v3.6.7Fix Suggestion:
Update to version v3.6.7https://github.com/Mbed-TLS/mbedtls.git (GITHUB):
Affected version(s) >=v4.0.0 <v4.1.1Fix Suggestion:
Update to version v4.1.1https://github.com/Mbed-TLS/mbedtls.git (GITHUB):
Affected version(s) >=mbedtls-3.3.0 <mbedtls-3.6.7Fix Suggestion:
Update to version mbedtls-3.6.7https://github.com/Mbed-TLS/mbedtls.git (GITHUB):
Affected version(s) >=mbedtls-4.0.0 <mbedtls-4.1.1Fix Suggestion:
Update to version mbedtls-4.1.1Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
2.1
Attack Vector
LOCAL
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
2.9
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Unexpected Status Code or Return Value
EPSS
Base Score:
0.10