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C#: packed repeated uint32 lacks the preallocation present in the C++ codec

feature request

untriagedauto added to all issues by default when created.auto added to all issues by default when created.

Status: Open.

#28925 In protocolbuffers/protobuf;

· richardcocks opened on Jul 30, 2026

Feature request: option for JsonFormat.Printer to fail if unknown fields are encountered

feature request

json

Status: Open.

#28922 In protocolbuffers/protobuf;

· devinrsmith opened on Jul 30, 2026

Quadratic-time denial of service in text_format.Parse for recursive map fields

bug

python

Status: Open.

#28864 In protocolbuffers/protobuf;

· geo-chen opened on Jul 28, 2026

It seems there is a typo in C++ Arena Allocation Guide document.

feature request

Status: Open.

#28830 In protocolbuffers/protobuf;

· dyx2025 opened on Jul 27, 2026

upb parses float/double field defaults with locale-dependent strtod, breaking descriptor loading under a comma-decimal LC_NUMERIC

Status: Open.

#28796 In protocolbuffers/protobuf;

· dxqb opened on Jul 24, 2026

Inconsistency between ProtoJSON spec and conformance test for duplicate keys

bug

documentation

json

Status: Open.

#28791 In protocolbuffers/protobuf;

· anuraaga opened on Jul 24, 2026

_message.pyd for Windows Python is missing NX and ASLR

38.x

bug

feature request

python

Status: Open.

#28688 In protocolbuffers/protobuf;

· EeroKurimo opened on Jul 20, 2026

[benchmark] Request for call-path / fairness review (GLD.SerializerBenchmark)

Status: Open.

#28661 In protocolbuffers/protobuf;

· leo-gan opened on Jul 17, 2026

[benchmark] Request for call-path / fairness review (GLD.SerializerBenchmark)

Status: Open.

#28660 In protocolbuffers/protobuf;

· leo-gan opened on Jul 17, 2026

[benchmark] Request for call-path / fairness review (GLD.SerializerBenchmark)

Status: Open.

#28659 In protocolbuffers/protobuf;

· leo-gan opened on Jul 17, 2026

[benchmark] Request for call-path / fairness review (GLD.SerializerBenchmark)

Status: Open.

#28658 In protocolbuffers/protobuf;

· leo-gan opened on Jul 17, 2026

[benchmark] Request for call-path / fairness review (GLD.SerializerBenchmark)

Status: Open.

#28657 In protocolbuffers/protobuf;

· leo-gan opened on Jul 17, 2026