CVE-2026-34871: n/a
CVE-2026-34871 is a vulnerability in Mbed TLS versions before 3.6.6 and 4.x before 4.1.0, as well as TF-PSA-Crypto before 1.1.0, involving a predictable seed in a pseudo-random number generator (PRNG). This weakness can compromise the confidentiality and integrity of cryptographic operations relying on the affected PRNG. The vulnerability has a medium severity with a CVSS score of 6.
AI Analysis
Technical Summary
This vulnerability concerns a predictable seed used in the PRNG component of Mbed TLS and TF-PSA-Crypto libraries in specified versions. A predictable seed reduces the randomness quality, potentially allowing attackers to predict cryptographic outputs, leading to high confidentiality and integrity impacts. The CVSS vector indicates the attack requires local access with high attack complexity and no privileges or user interaction. The vulnerability is tracked as CWE-338 (Use of Cryptographically Weak Pseudo-Random Number Generator).
Potential Impact
The vulnerability can lead to compromise of confidentiality and integrity of cryptographic operations that depend on the affected PRNG. This may allow attackers with local access to predict cryptographic values, undermining security mechanisms. Availability is not impacted. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should monitor vendor communications for updates. No specific mitigations are provided in the current data.
CVE-2026-34871: n/a
Description
CVE-2026-34871 is a vulnerability in Mbed TLS versions before 3.6.6 and 4.x before 4.1.0, as well as TF-PSA-Crypto before 1.1.0, involving a predictable seed in a pseudo-random number generator (PRNG). This weakness can compromise the confidentiality and integrity of cryptographic operations relying on the affected PRNG. The vulnerability has a medium severity with a CVSS score of 6.
CVSS v3.1
Score 6.7medium
Affected software
pkg:github/armmbed/mbedtlspkg:github/armmbed/tf-psa-cryptoRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability concerns a predictable seed used in the PRNG component of Mbed TLS and TF-PSA-Crypto libraries in specified versions. A predictable seed reduces the randomness quality, potentially allowing attackers to predict cryptographic outputs, leading to high confidentiality and integrity impacts. The CVSS vector indicates the attack requires local access with high attack complexity and no privileges or user interaction. The vulnerability is tracked as CWE-338 (Use of Cryptographically Weak Pseudo-Random Number Generator).
Potential Impact
The vulnerability can lead to compromise of confidentiality and integrity of cryptographic operations that depend on the affected PRNG. This may allow attackers with local access to predict cryptographic values, undermining security mechanisms. Availability is not impacted. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should monitor vendor communications for updates. No specific mitigations are provided in the current data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-03-31T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
Threat ID: 69cd69c0e6bfc5ba1deb9268
Added to database: 04/01/2026, 18:53:52 UTC
Last enriched: 05/31/2026, 21:01:57 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 146
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