CVE-2021-21289

Mechanize is an open-source ruby library that makes automated web interaction easy. In Mechanize from version 2.0.0 and before version 2.7.7 there is a command injection vulnerability. Affected versions of mechanize allow for OS commands to be injected using several classes' methods which implicitly use Ruby's Kernel.open method. Exploitation is possible only if untrusted input is used as a local filename and passed to any of these calls: Mechanize::CookieJar#load, Mechanize::CookieJar#save_as, Mechanize#download, Mechanize::Download#save, Mechanize::File#save, and Mechanize::FileResponse#read_body. This is fixed in version 2.7.7.

• CWE-78
• CWE-78

• https://github.com/sparklemotion/mechanize/commit/66a6a1bfa653a5f13274a396a5e5441238656aa0Patch, Third Party Advisory
• https://github.com/sparklemotion/mechanize/releases/tag/v2.7.7Release Notes, Third Party Advisory
• https://github.com/sparklemotion/mechanize/security/advisories/GHSA-qrqm-fpv6-6r8gThird Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/02/msg00021.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LBVVJUL4P4KCJH4IQTHFZ4ATXY7XXZPV/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YNFZ7ROYS6V4J5L5PRAJUG2AWC7VXR2V/
• https://rubygems.org/gems/mechanize/Product, Third Party Advisory
• https://security.gentoo.org/glsa/202107-17Third Party Advisory
• https://github.com/sparklemotion/mechanize/commit/66a6a1bfa653a5f13274a396a5e5441238656aa0Patch, Third Party Advisory
• https://github.com/sparklemotion/mechanize/releases/tag/v2.7.7Release Notes, Third Party Advisory
• https://github.com/sparklemotion/mechanize/security/advisories/GHSA-qrqm-fpv6-6r8gThird Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/02/msg00021.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LBVVJUL4P4KCJH4IQTHFZ4ATXY7XXZPV/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YNFZ7ROYS6V4J5L5PRAJUG2AWC7VXR2V/
• https://rubygems.org/gems/mechanize/Product, Third Party Advisory
• https://security.gentoo.org/glsa/202107-17Third Party Advisory

Published

Feb 2, 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.

• CVE-2021-21283Flarum is an open source discussion platform for websites. T…5.4
• CVE-2021-21284In Docker before versions 9.03.15, 20.10.3 there is a vulner…6.8
• CVE-2021-21285In Docker before versions 9.03.15, 20.10.3 there is a vulner…6.5
• CVE-2021-21286AVideo Platform is an open-source Audio and Video platform. …8.8
• CVE-2021-21287MinIO is a High Performance Object Storage released under Ap…7.7
• CVE-2021-21288CarrierWave is an open-source RubyGem which provides a simpl…4.3
• CVE-2021-2129Vulnerability in the Oracle VM VirtualBox product of Oracle …7.9
• CVE-2021-21290Netty is an open-source, asynchronous event-driven network a…5.5
• CVE-2021-21291OAuth2 Proxy is an open-source reverse proxy and static file…6.1
• CVE-2021-21292Traccar is an open source GPS tracking system. In Traccar be…6.3
• CVE-2021-21293blaze is a Scala library for building asynchronous pipelines…7.5
• CVE-2021-21294Http4s (http4s-blaze-server) is a minimal, idiomatic Scala i…7.5