CVE-2021-29495

7.5 highEPSS 0.5%

High (7.5) in nim-lang nim. 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.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)
CWE: CWE-295
Published: 2021-05-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

nim-lang:nim

References

https://github.com/nim-lang/security/security/advisories/GHSA-9vqv-2jj9-7mqr
https://github.com/nim-lang/security/security/advisories/GHSA-9vqv-2jj9-7mqr

Check your stack JSON