---
id: CVE-2026-71485
title: Centrifugo is an open-source scalable real-time messaging server
summary: >-
  Centrifugo is an open-source scalable real-time messaging server. Prior to
  6.9.0, Centrifugo copies the client-controlled protocol.ConnectRequest.headers
  map through OnClientConnecting in internal/client/handler.go,
  ConnectEvent.Headers,…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-290
vendor: centrifugal
product: github.com/centrifugal/centrifugo
affected:
  - github.com/centrifugal/centrifugo < 6.9.0
patched:
  - github.com/centrifugal/centrifugo 6.9.0
published: '2026-08-20'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:09:01.757'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71485'
references:
  - url: >-
      https://github.com/centrifugal/centrifugo/commit/84d38cea1dd2efa24375a148817a974c8727f4b0
    label: security-advisories@github.com
  - url: 'https://github.com/centrifugal/centrifugo/pull/1182'
    label: security-advisories@github.com
  - url: 'https://github.com/centrifugal/centrifugo/releases/tag/v6.9.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/centrifugal/centrifugo/security/advisories/GHSA-9468-v6mj-fppw
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71485'
  - url: 'https://github.com/centrifugal/centrifugo'
  - url: 'https://github.com/advisories/GHSA-9468-v6mj-fppw'
tags:
  - nvd
  - osv
  - go
  - ghsa
epss: 0.00423
epssPercentile: 0.36237
aliases:
  - GHSA-9468-v6mj-fppw
ecosystem: go
ingestedAt: '2026-09-03T19:32:13.172Z'
---

## Overview

Centrifugo is an open-source scalable real-time messaging server. Prior to 6.9.0, Centrifugo copies the client-controlled protocol.ConnectRequest.headers map through OnClientConnecting in internal/client/handler.go, ConnectEvent.Headers, and SetEmulatedHeadersToContext. The requestHeaders path in internal/proxy/http.go, the requestMetadata path in internal/proxy/grpc.go, and the Consume path in internal/unigrpc/grpc.go can forward an allowlisted value as a trusted backend header or metadata value. A remote client can spoof a header such as x-trusted-user for connect, refresh, subscribe, publish, RPC, and related proxy calls when the backend relies on that header for authentication or authorization. The unidirectional gRPC transport has no transport-level HTTP header that can override the emulated value. This issue is fixed in version 6.9.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-71485)

Affected packages:

- `github.com/centrifugal/centrifugo < 6.9.0`

Patched in:

- `github.com/centrifugal/centrifugo 6.9.0`

Source: https://osv.dev/vulnerability/GHSA-9468-v6mj-fppw