Free tools
Free Magento security patches.
Backports for the Magento versions Adobe stopped patching, and the tools to go with them. Each one installs with Composer and keeps its source on GitHub. No signup wall.
Running something we haven't covered?
Send the version and the CVE. If we can backport the fix, we'll publish it here. If we can't, we'll say so.
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Any repo or store running one of these may carry the badge. SVG in each release's assets.