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Restrict builtins within lambdas for ImageMath.eval#6009

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radarhere merged 1 commit intopython-pillow:mainfrom
radarhere:eval
Feb 2, 2022
Merged

Restrict builtins within lambdas for ImageMath.eval#6009
radarhere merged 1 commit intopython-pillow:mainfrom
radarhere:eval

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#5923 (comment) has pointed out that #5923 does not protect against lambdas wrapping unwanted code.

ImageMath.eval("(lambda: exit())()")

I can also imagine a lambda wrapping a lambda.

ImageMath.eval("(lambda: (lambda: exit())())()")

This PR protects against both.

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