CVE-2021-21372

Nimble is a package manager for the Nim programming language. In Nim release version before versions 1.2.10 and 1.4.4, Nimble doCmd is used in different places and can be leveraged to execute arbitrary commands. An attacker can craft a malicious entry in the packages.json package list to trigger code execution.

• CWE-20
• CWE-74
• CWE-78

• https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-remote-code-execution/Exploit, Third Party Advisory
• https://github.com/nim-lang/nimble/blob/master/changelog.markdown#0130Release Notes, Third Party Advisory
• https://github.com/nim-lang/nimble/commit/7bd63d504a4157b8ed61a51af47fb086ee818c37Patch, Third Party Advisory
• https://github.com/nim-lang/security/security/advisories/GHSA-rg9f-w24h-962pThird Party Advisory
• https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-remote-code-execution/Exploit, Third Party Advisory
• https://github.com/nim-lang/nimble/blob/master/changelog.markdown#0130Release Notes, Third Party Advisory
• https://github.com/nim-lang/nimble/commit/7bd63d504a4157b8ed61a51af47fb086ee818c37Patch, Third Party Advisory
• https://github.com/nim-lang/security/security/advisories/GHSA-rg9f-w24h-962pThird Party Advisory

Published

Mar 26, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

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