- Patched critical CVE‑2025‑30215 affecting all NATS Server versions prior to v2.11.1/v2.10.27.
- Added proper account validation for several system API calls and enforced system/account limits during stream restore.
- Fixed a performance regression when max messages per subject is 1 and corrected JetStream validation issues.
Release v2.10.27
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Added Leafnodes support with a configurable dial timeout option for high‑latency links
Upgrade to Go 1.25.12 and bump critical dependencies (klauspost/compress v1.19.2, golang.org/x/crypto v0.55.0).
Decoupled Raft transport and increased disk concurrency (now configurable) with several JetStream performance and memory optimizations;