CVE-2021-29495: Nim-Lang Nim

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Nim is a statically typed compiled systems programming language. In Nim standard library before 1.4.2, httpClient SSL/TLS certificate verification was disabled by default. Users can upgrade to version 1.4.2 to receive a patch or, as a workaround, set "verifyMode = CVerifyPeer" as documented.

Affected products

• Nim-Lang Nim: before 1.4.2 (fixed in 1.4.2)

Published 2021-05-07. Last modified 2026-06-17.