HIGH 7.5 Microsoft
CVE-2026-40170
ngtcp2 has a qlog transport parameter serialization stack buffer overflow
Microsoft Security Update 2026-Apr: ngtcp2 has a qlog transport parameter serialization stack buffer overflow
Affected Products
- cbl2 nodejs18 18.20.3-12 on CBL Mariner 2.0
- azl3 nodejs 20.14.0-15 on Azure Linux 3.0
- azl3 nodejs24 24.14.1-2 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40170
- https://nvd.nist.gov/vuln/detail/CVE-2026-40170
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-04-14 via Microsoft. Affected: cbl2 nodejs18 18.20.3-12 on CBL Mariner 2.0, azl3 nodejs 20.14.0-15 on Azure Linux 3.0, azl3 nodejs24 24.14.1-2 on Azure Linux 3.0.
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