---
title: "v1.3.8"
description: "v1.3.8 changelog"
---

<Update label="Bifrost Enterprise" description="v1.3.8">

This release upgrades the base OSS version from v1.4.10 to v1.4.11, bringing Anthropic cache control for tool calls, Helm graceful shutdown improvements, Codex compatibility fixes, and numerous streaming/serialization bug fixes. On the enterprise side, Gray Swan guardrails now support custom base URLs.

This build also upgrades to go 1.26.1 - that fixes CVE-2026-25679, CVE-2026-27137, CVE-2026-27138, CVE-2026-27139, CVE-2026-27142.

### ✨ Features

- Gray Swan Custom Base URL — Added support for custom base URLs in Gray Swan guardrails configuration
- Anthropic Cache Control for Tool Calls — Added cache-control support for Anthropic tool calls
- Helm Graceful Shutdown — Added graceful shutdown and HPA stabilization for streaming connections
- Logstore Sonic Serialization — Replaced encoding/json with sonic for logstore serialization, improving performance
- Maxim Attachments — Added attachment support to Maxim plugin

### 🚨 Breaking changes

Based on our recent pentesting, we have updated configuration for open endpoints.

1. /metrics endpoint is now protected behind auth. You can create an API key - and add Metrics scope to it. You have to configure scraper with Header authorization `bearer api_key`

### 🐞 Fixed

- Codex Compatibility — Fixed fallback handling and request decompression for Codex compatibility
- Anthropic SSE Streaming — Use NewSSEScanner for Responses API streaming
- Audio Filename Preservation — Preserve original audio filename in transcription requests
- Proxy Override — Fixed proxy override handling
- Raw Request Serialization — Fixed raw request serialization in SSE events
- Key List Models — Fixed key list models serialization
- Async Job Recovery — Fixed async jobs stuck in "processing" on marshal failure, now correctly transition to "failed"
- Valkey/Redis Vector Store — Improved Valkey Search compatibility and correctness in Redis vector store
- Semanticcache Nil Check — Added nil check on message Content before accessing fields
- Dashboard Overflow — Resolved dashboard and provider config overflow regressions
- Config Schema Alignment — Fixed config schema and added test to verify Go model alignment
- Key Selection Panic — Prevent panic in key selection when all keys have zero weight
- Security Patches — Applied security patches including default Anthropic error type fix

### 📀 Base OSS version

```
transports/v1.4.12-0.20260306144022-5ac7c2732345
```

### 🔌 If you are compiling plugin against this release - use following deps

```
github.com/maximhq/bifrost/core v1.4.8-0.20260306144022-5ac7c2732345
github.com/maximhq/bifrost/framework v1.2.26
github.com/maximhq/bifrost/plugins/governance v1.4.27
github.com/maximhq/bifrost/plugins/logging v1.4.27
github.com/maximhq/bifrost/transports v1.4.12-0.20260306144022-5ac7c2732345
```

</Update>