---
id: CVE-2026-119660
title: MuseBot before 2.0.0 Authentication Bypass via Hard-Coded Session Key
summary: >-
  MuseBot before 2.0.0 contains an authentication bypass vulnerability that
  allows unauthenticated attackers to forge admin sessions by using the
  hard-coded default session_key 'muse_bot_session_key'. Attackers can sign a
  MuseBot-session c…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-1394
vendor: yincongcyincong
product: MuseBot
affected:
  - MuseBot < 2.0.0
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-11-05T21:33:48.218500Z'
exploitAvailable: true
published: '2026-10-30'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:34:06.489Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-119660'
references:
  - url: 'https://github.com/yincongcyincong/MuseBot/issues/61'
  - url: >-
      https://github.com/yincongcyincong/MuseBot/commit/3e64518948fe7037058f07ef987d35216c3f0cae
  - url: >-
      https://github.com/yincongcyincong/MuseBot/commit/139f6158b50283b983d76976f593a3a09a064681
  - url: >-
      https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/conf/conf.go#L28
  - url: >-
      https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/controller/login.go#L19-L88
  - url: >-
      https://hackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypass
  - url: 'https://github.com/yincongcyincong/MuseBot'
  - url: >-
      https://www.vulncheck.com/advisories/musebot-before-2.0.0-authentication-bypass-via-hard-coded-session-key
    label: >-
      VulnCheck Advisory: MuseBot before 2.0.0 Authentication Bypass via
      Hard-Coded Session Key
tags:
  - cve.org
  - exploit-available
epss: 0.0052
epssPercentile: 0.44397
ingestedAt: '2026-11-05T16:07:30.287Z'
---

## Overview

MuseBot before 2.0.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge admin sessions by using the hard-coded default session_key 'muse_bot_session_key'. Attackers can sign a MuseBot-session cookie carrying a user_id to gain full administrative access, reading password hashes, chat records, and bot configuration, and stopping bots.

## Affected

- `MuseBot < 2.0.0`

## Remediation

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