CVE-2026-34871

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-34871
An issue was discovered in Mbed TLS before 3.6.6 and 4.x before 4.1.0 and TF-PSA-Crypto before 1.1.0. There is a Predictable Seed in a Pseudo-Random Number Generator (PRNG).

6.7 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.4 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://mbed-tls.readthedocs.io/en/latest/security-advisories/ Vendor Advisory
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-dev-random/ Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
cpe:2.3:a:arm:tf-psa-crypto:*:*:*:*:*:*:*:*
History

06 Apr 2026, 14:30

Type Values Removed Values Added
First Time Arm tf-psa-crypto
Arm
Arm mbed Tls
CPE cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
cpe:2.3:a:arm:tf-psa-crypto:*:*:*:*:*:*:*:*
References () https://mbed-tls.readthedocs.io/en/latest/security-advisories/ - () https://mbed-tls.readthedocs.io/en/latest/security-advisories/ - Vendor Advisory
References () https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-dev-random/ - () https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-dev-random/ - Vendor Advisory

01 Apr 2026, 21:17

Type Values Removed Values Added
CWE CWE-338
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.7

01 Apr 2026, 19:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-01 19:16

Updated : 2026-04-06 14:30

NVD link : CVE-2026-34871

Mitre link : CVE-2026-34871

CVE.ORG link : CVE-2026-34871

JSON object : View

Products Affected

arm

  • mbed_tls
  • tf-psa-crypto
CWE
CWE-338

Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)