SecuriTricks - CVE-2026-34871

Description

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).

Product(s) Impacted

Vendor	Product	Versions
Mbed Tls	Mbed Tls	<3.6.6, <4.1.0
Tf Psa Crypto	Tf Psa Crypto	<1.1.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-338

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

The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	mbed_tls	mbed_tls	<3.6.6	/	/	/	/	/	/	/
a	mbed_tls	mbed_tls	<4.1.0	/	/	/	/	/	/	/
a	tf_psa_crypto	tf_psa_crypto	<1.1.0	/	/	/	/	/	/	/

References

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

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

CVSS Score

6.7 / 10

CVSS Data - 3.1

Attack Vector: LOCAL
Attack Complexity: HIGH
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: HIGH
Integrity Impact: HIGH
Availability Impact: NONE

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

View Vector String

Timeline

Published: April 1, 2026, 7:16 p.m.
Last Modified: April 1, 2026, 9:17 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-34871