by Kastro
Paper/Archive/CVE-2026-119660

CVE-2026-119660

yincongcyincong MuseBot — MuseBot before 2.0.0 Authentication Bypass via Hard-Coded Session Key

CVSS 9.8
critical.is priorityof 100
29
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0No EPSS score.000 × 200.0No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
MuseBot< 2.0.02.0.0CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

refgithub.com/yincongcyincong/MuseBot/issues/61patchgithub.com/yincongcyincong/MuseBot/commit/3e64518948fe7037058f07ef987d35216c3f0caepatchgithub.com/yincongcyincong/MuseBot/commit/139f6158b50283b983d76976f593a3a09a064681writeupgithub.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/conf/conf.go#L28writeupgithub.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/controller/login.go#L19-L88writeuphackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypassrefgithub.com/yincongcyincong/MuseBotwriteupvulncheck.com/advisories/musebot-before-2.0.0-authentication-bypass-via-hard-coded-session-key