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.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Apr 1, 2026 · NIST NVD

   Detected

   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).

2. Jun 17, 2026 · NIST NVD

   Updated

   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).

Affected

• cpe arm/mbed tlsversion unspecified
• cpe trustedfirmware/tf-psa-cryptoversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-34871

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-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).

  nvd.nist.gov

References

• Vendor Advisory · mbed-tls.readthedocs.io
• Vendor Advisory · mbed-tls.readthedocs.io