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ccd2e83c57
The backup and restore command builders interpolated database name / user /
password directly into a 'docker exec ... {bash,sh} -c "..."' string executed
via execAsync / execAsyncRemote. Because the values sit inside the outer shell's
double quotes, a simple quote() is insufficient: the outer shell expands $(),
backticks and $VAR before the inner quoting applies (double-nested shell).
Values are now passed to the container as environment variables (docker exec -e
VAR=<shell-quoted>) and referenced as "$VAR" inside a single-quoted inner
script, so they never enter the inner command text and cannot break out of
either shell layer. The rest of each command (pg_dump/mysqldump/etc., flags,
| gzip) is unchanged.
Closes GHSA-qc73-mp78-4833, GHSA-qf8x-98cv-92qh, GHSA-ww4j-wjrr-rq8v, GHSA-7m3w-rm5f-h4fr, GHSA-f7mp-9jfp-mjrr