# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression.
sed -E 's/<img [^>]*?src=["\']data:image\/svg\+xml[^>]+>//g;t' <<< "<div>
<img class=\"bumbum\"><img src=\"data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="960" height="640"%3E%3C/svg%3E\" />
</div>"
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for SED, please visit: https://www.gnu.org/software/sed/manual/html_node/The-_0022s_0022-Command.html