CVE-2026-119660: critical vulnerability in yincongcyincong MuseBot
MuseBot before 2.0.0 Authentication Bypass via Hard-Coded Session Key
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 0.5%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
yincongcyincong · MuseBotReferences
https://github.com/yincongcyincong/MuseBothttps://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/conf/conf.go#L28https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/controller/login.go#L19-L88https://github.com/yincongcyincong/MuseBot/commit/139f6158b50283b983d76976f593a3a09a064681https://github.com/yincongcyincong/MuseBot/commit/3e64518948fe7037058f07ef987d35216c3f0caehttps://github.com/yincongcyincong/MuseBot/issues/61https://hackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypasshttps://www.vulncheck.com/advisories/musebot-before-2.0.0-authentication-bypass-via-hard-coded-session-key