Fix Any recursion depth bypass in Python json_format.ParseDict (#25239)#25586
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Fix Any recursion depth bypass in Python json_format.ParseDict (#25239)#25586
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This fixes a security vulnerability where nested google.protobuf.Any messages could bypass the max_recursion_depth limit, potentially leading to denial of service via stack overflow. The root cause was that _ConvertAnyMessage() was calling itself recursively via methodcaller() for nested well-known types, bypassing the recursion depth tracking in ConvertMessage(). The fix routes well-known type parsing through ConvertMessage() to ensure proper recursion depth accounting for all message types including nested Any. Fixes #25070 Closes #25239 COPYBARA_INTEGRATE_REVIEW=#25239 from aviralgarg05:fix-any-recursion-depth-bypass 3cbbcbe PiperOrigin-RevId: 862740421
esrauchg
approved these changes
Jan 29, 2026
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This fixes a security vulnerability where nested google.protobuf.Any messages could bypass the max_recursion_depth limit, potentially leading to denial of service via stack overflow.
The root cause was that _ConvertAnyMessage() was calling itself recursively via methodcaller() for nested well-known types, bypassing the recursion depth tracking in ConvertMessage().
The fix routes well-known type parsing through ConvertMessage() to ensure proper recursion depth accounting for all message types including nested Any.
Fixes #25070
Closes #25239
COPYBARA_INTEGRATE_REVIEW=#25239 from aviralgarg05:fix-any-recursion-depth-bypass 3cbbcbe PiperOrigin-RevId: 862740421