The bug in Sentry's Python SDK <2.8.0 results in the unintentional exposure of environment variables to subprocesses despite the env={}
setting.
In Python's subprocess
calls, all environment variables are passed to subprocesses by default. However, if you specifically do not want them to be passed to subprocesses, you may use env
argument in subprocess
calls, like in this example:
>>> subprocess.check_output(["env"], env={"TEST":"1"})
b'TEST=1\n'
If you'd want to not pass any variables, you can set an empty dict:
>>> subprocess.check_output(["env"], env={})
b''
However, the bug in Sentry SDK <2.8.0 causes all environment variables to be passed to the subprocesses when env={}
is set, unless the Sentry SDK's Stdlib integration is disabled. The Stdlib integration is enabled by default.
The issue has been patched in https://github.com/getsentry/sentry-python/pull/3251 and the fix released in sentry-sdk==2.8.0. The fix was also backported to sentry-sdk==1.45.1.
We strongly recommend upgrading to the latest SDK version. However, if it's not possible, and if passing environment variables to child processes poses a security risk for you, there are two options:
env={}
with the minimal dict env={"EMPTY_ENV":"1"}
or similar.OR
import sentry_sdk
# Should go before sentry_sdk.init
sentry_sdk.integrations._DEFAULT_INTEGRATIONS.remove("sentry_sdk.integrations.stdlib.StdlibIntegration")
sentry_sdk.init(...)