CRITICAL 9.1 Microsoft
CVE-2026-34872
An issue was discovered in Mbed TLS 3.5.x and 3.6.x through 3.6.5 and TF-PSA-Crypto 1.0. There is a lack of contributory behavior in FFDH due to improper input validation. Using finite-field Diffie-Hellman, the other party can force the shared secret into a small set of values (lack of contributory behavior). This is a problem for protocols that depend on contributory behavior (which is not the case for TLS). The attack can be carried by the peer, or depending on the protocol by an active network attacker (person in the middle).
Microsoft Security Update 2026-Apr: An issue was discovered in Mbed TLS 3.5.x and 3.6.x through 3.6.5 and TF-PSA-Crypto 1.0. There is a lack of contributory behavior in FFDH due to improper input validation. Using finite-field Diffie-Hellman, the other party can force the shared secret into a small set of values (lack of contributory behavior). This is a problem for protocols that depend on contributory behavior (which is not the case for TLS). The attack can be carried by the peer, or depending on the protocol by an active network attacker (person in the middle).
Affected Products
- azl3 nodejs24 24.14.1-2 on Azure Linux 3.0
- azl3 nodejs 24.14.1-3 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34872
- https://nvd.nist.gov/vuln/detail/CVE-2026-34872
This critical severity vulnerability with a CVSS score of 9.1 was published on 2026-04-14 via Microsoft. Affected: azl3 nodejs24 24.14.1-2 on Azure Linux 3.0, azl3 nodejs 24.14.1-3 on Azure Linux 3.0.
Risk Timeline
CVE Disclosed2026-04-14 · 117 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34872NVD / MITRE
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