NuGet
protobuf-net
Provides simple access to fast and efficient "Protocol Buffers" serialization from .NET applications
binaryserializationprotobuf
github.com/protobuf-net/protobuf-netprotobuf-net.dev/Apache-2.0Marc Gravell5k · 1.1k forks · 108 contributors
Release cadenceEvery 4 days
Last releaseOct 21, 2026
Open advisories0
Changelog quality13% curated
GitHub Releases, gaps for some releases
Release history SecurityYou're on
69 older or filtered releases not shown.
Upgrade guides
Breaking changes and a migration checklist for each major versionVersionChannelDateChangesSecurity
3.4.40 StableOct 21, 2026New1Changed4Fixed1Other33.4.30 StableSep 16, 2026New13.4.29 StableSep 15, 2026Other13.4.28 StableSep 15, 2026New1Other63.4.21 StableAug 31, 2026Fixed1Other13.4.19 StableAug 25, 2026New1Changed1Fixed23.4.14 StableAug 21, 2026New1Changed3Other93.4.0 StableAug 20, 2026New5Changed2Other63.3.21 youStableAug 17, 2026Breaking1Deprecated1New3Changed1Fixed2Other33.3.8 StableAug 11, 2026Changed1Fixed1Other63.3.0 StableAug 11, 2026New5Changed3Fixed1Other43.3.0-g6785ecbb35 YankedOct 20, 2026No notes published3.2.56 StableJul 31, 2025Changed13.2.55 StableJul 27, 2025Fixed2Other13.2.52 StableApr 11, 2025New1Changed2Fixed13.2.46 StableJan 24, 2025New1Changed13.2.45 StableOct 23, 2024New4Changed2Fixed6Other13.2.30 StableSep 27, 2023New23.2.26 StableMay 25, 2023New3Fixed43.2.26-gbb5bfa8027 YankedOct 20, 2026No notes published