As mentioned in early messages to oss-sec, I've inherited maintainership of the cgit codebase and am gradually auditing it. Today I found a nasty directory traversal: http://somehost/?url=/somerepo/about/../../../../etc/passwd This should be pretty straightforward to categorize. Exploitation looks like: http://data.zx2c4.com/cgit-directory-traversal.png I've committed a fix for it here: http://git.zx2c4.com/cgit/commit/?h=wip&id=babf94e04e74123eb658a823213c062663cdadd6 And this fix will be in the master branch and a new release will be made soon. Cgit by default is not vulnerable to this, and the vulnerability only exists when a user has configured cgit to use a readme file from a filesystem filepath instead of from the git repo itself. Until a release is made, administrators are urged to disable reading the readme file from a filepath, if currently enabled.