---
id: CVE-2026-63406
title: >-
  AnyCable is a realtime server for reliable two-way communication that supports
  any backend
summary: >-
  AnyCable is a realtime server for reliable two-way communication that supports
  any backend. Prior to 1.6.15, the telemetry subsystem in telemetry/config.go
  enables tracking with a hardcoded public authToken, while clusterFingerprint
  in t…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-312
  - CWE-798
vendor: anycable
product: github.com/anycable/anycable
affected:
  - github.com/anycable/anycable <= 1.6.14
patched:
  - github.com/anycable/anycable 1.6.15
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:10.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63406'
references:
  - url: >-
      https://github.com/anycable/anycable/commit/201c67e99e463ed63bd6b345562f4c458385fcee
    label: security-advisories@github.com
  - url: 'https://github.com/anycable/anycable/releases/tag/v1.6.15'
    label: security-advisories@github.com
  - url: >-
      https://github.com/anycable/anycable/security/advisories/GHSA-w72w-9qmj-c9qm
    label: security-advisories@github.com
  - url: >-
      https://github.com/anycable/anycable/security/advisories/GHSA-w72w-9qmj-c9qm
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-w72w-9qmj-c9qm'
  - url: 'https://github.com/anycable/anycable'
tags:
  - nvd
  - ghsa
  - go
  - cve.org
  - exploit-available
  - osv
aliases:
  - GHSA-w72w-9qmj-c9qm
ecosystem: go
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T17:02:25.322916Z'
ingestedAt: '2026-09-18T17:46:41.522Z'
epss: 0.00245
epssPercentile: 0.16043
---

## Overview

AnyCable is a realtime server for reliable two-way communication that supports any backend. Prior to 1.6.15, the telemetry subsystem in telemetry/config.go enables tracking with a hardcoded public authToken, while clusterFingerprint in telemetry/telemetry.go reads the full configuration file and raw os.Args returned by anycableCLIArgs, including values supplied through --secret, --jwt_secret, and --http_rpc_secret. These inputs are passed to generateDigest, where sha256.New produces the hexadecimal fingerprint that is sent as telemetry. The available source therefore does not show raw credentials leaving the process or establish the advisory's claimed confidentiality loss, although the stable fingerprint is derived from secret-bearing configuration and the default telemetry client uses publicly known authentication material. This issue is fixed in version 1.6.15.

## Remediation

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

## Package advisory (CVE-2026-63406)

Affected packages:

- `github.com/anycable/anycable <= 1.6.14`

Patched in:

- `github.com/anycable/anycable 1.6.15`

Source: https://github.com/advisories/GHSA-w72w-9qmj-c9qm