> This page is for SDK, version Legacy.
> For other versions, use one of these documentation indexes:
> - Current (default): https://buildwithfern.com/learn/sdks/current/llms.txt
> - Legacy: https://buildwithfern.com/learn/sdks/legacy/llms.txt

> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt.

## 4.2.3

**`(chore):`** 将 Gradle 基础镜像捆绑的 Bouncy Castle jar 包从 1.78.1 升级至 1.84，以解决 CVE-2026-3505（bcpg 中无界的 PGP AEAD 块大小导致预认证资源耗尽）。