There is a potential denial of service vulnerability present in
ActiveRecord’s PostgreSQL adapter.

This has been assigned the CVE identifier CVE-2022-44566.

Versions Affected: All.
Not affected: None.
Fixed Versions: 5.2.8.15 (Rails LTS), 6.1.7.1, 7.0.4.1

Impact

In ActiveRecord <7.0.4.1 and <6.1.7.1, when a value outside the range for a
64bit signed integer is provided to the PostgreSQL connection adapter, it
will treat the target column type as numeric. Comparing integer values
against numeric values can result in a slow sequential scan resulting in
potential Denial of Service.

Workarounds

Ensure that user supplied input which is provided to ActiveRecord clauses do
not contain integers wider than a signed 64bit representation or floats.