CVE-2026-119660
MuseBot before 2.0.0 Authentication Bypass via Hard-Coded Session Key
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1394 |
| Vendor | yincongcyincong |
| Product | musebot |
| Published | Oct 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
yincongcyincong / MuseBot
0 < 2.0.0
References
github.com: https://github.com/yincongcyincong/MuseBot/issues/61 github.com: https://github.com/yincongcyincong/MuseBot/commit/3e64518948fe7037058f07ef987d35216c3f0cae github.com: https://github.com/yincongcyincong/MuseBot/commit/139f6158b50283b983d76976f593a3a09a064681 github.com: https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/conf/conf.go#L28 github.com: https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/controller/login.go#L19-L88 hackmd.io: https://hackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypass github.com: https://github.com/yincongcyincong/MuseBot vulncheck.com: https://www.vulncheck.com/advisories/musebot-before-2.0.0-authentication-bypass-via-hard-coded-session-key
Credits
hieuPenguinnn yincongcyincong