Name: CVE-2021-29495: Improper Certificate Validation
Creator: Rapid7
Published: 2021-05-07T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-29495, CWE-295, CVSS 5.9, EPSS 0.00491

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.

CVSS Details

CVSS 3.1 Base Score: 5.9
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade nim	Jul 30, 2024	May 7, 2021
Suse	—	Upgrade nim	Oct 26, 2022	May 7, 2021
Ubuntu	—	No solution exists	Jun 26, 2025	May 7, 2021

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CVSS Details

Covered by Rapid7

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