CVE-2026-34871 | mbed TLS up to 3.6.5/4.0.x entropy

VDB-354758 · CVE-2026-34871 · GCVE-0-2026-34871 MBED TLS UP TO 3.6.5/4.0.X ENTROPY HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.6 $0-$5k 0.73+ Summaryinfo A vulnerability described as problematic has been identified in mbed TLS up to 3.6.5/4.0.x. This affects an unknown function. Such manipulation leads to entropy. This vulnerability is listed as CVE-2026-34871. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended. Detailsinfo A vulnerability was found in mbed TLS up to 3.6.5/4.0.x and classified as problematic. Affected by this issue is an unknown code block. The manipulation with an unknown input leads to a entropy vulnerability. Using CWE to declare the problem leads to CWE-332. The lack of entropy available for, or used by, a Pseudo-Random Number Generator (PRNG) can be a stability and security threat. Impacted is confidentiality. CVE summarizes: 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). The advisory is available at mbed-tls.readthedocs.io. This vulnerability is handled as CVE-2026-34871 since 03/31/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600.001 by the MITRE ATT&CK project. Upgrading to version 1.1.0, 3.6.6 or 4.1.0 eliminates this vulnerability. Productinfo Name mbed TLS Version 3.6.0 3.6.1 3.6.2 3.6.3 3.6.4 3.6.5 4.0 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 3.7 VulDB Meta Temp Score: 3.6 VulDB Base Score: 3.7 VulDB Temp Score: 3.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Entropy CWE: CWE-332 / CWE-331 / CWE-330 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: mbed TLS 1.1.0/3.6.6/4.1.0 Timelineinfo 03/31/2026 CVE reserved 04/01/2026 +1 days Advisory disclosed 04/01/2026 +0 days VulDB entry created 04/01/2026 +0 days VulDB entry last update Sourcesinfo Advisory: mbed-tls.readthedocs.io Status: Confirmed CVE: CVE-2026-34871 (🔒) GCVE (CVE): GCVE-0-2026-34871 GCVE (VulDB): GCVE-100-354758 Entryinfo Created: 04/01/2026 21:43 Changes: 04/01/2026 21:43 (53) Complete: 🔍 Cache ID: 99:66C:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸