diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 0417d2752689e5..5da5ffa07012d2 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -35,6 +35,15 @@ always available.
can then log the event, raise an exception to abort the operation,
or terminate the process entirely.
+ Note that audit hooks are primarily for collecting information about internal
+ or otherwise unobservable actions, whether by Python or libraries written in
+ Python. They are not suitable for implementing a "sandbox". In particular,
+ malicious code can trivially disable or bypass hooks added using this
+ function. At a minimum, any security-sensitive hooks must be added using the
+ C API :c:func:`PySys_AddAuditHook` before initialising the runtime, and any
+ modules allowing arbitrary memory modification (such as :mod:`ctypes`) should
+ be completely removed or closely monitored.
+
.. audit-event:: sys.addaudithook "" sys.addaudithook
Calling :func:`sys.addaudithook` will itself raise an auditing event
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