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    Bug 
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    Resolution: Unresolved
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    Major 
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    Jenkins version: 2.199
 Git plugin version: 3.12.1
 OS version: CentOS 7 (3.10.0-1062.1.2.el7.x86_64)
 Java version: 1.8.0_121
 no Tomcat, no reverse proxy
Jenkins generates invalid JSON on http://.../api/json url due to Git commit messages are included in changeset comment attribute as is (the control chars like \x00-\x1F are not filtered).
The excerpt of JSON structure is attached.