CVE-2026-119660

CVSS 9.8 (critical) · published 2026-10-30

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.

Weakness: CWE-1394

Source: NVD CVE-2026-119660

References

• https://github.com/yincongcyincong/MuseBot
• https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/conf/conf.go#L28
• https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/controller/login.go#L19-L88
• https://github.com/yincongcyincong/MuseBot/commit/139f6158b50283b983d76976f593a3a09a064681
• https://github.com/yincongcyincong/MuseBot/commit/3e64518948fe7037058f07ef987d35216c3f0cae
• https://github.com/yincongcyincong/MuseBot/issues/61
• https://hackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypass
• https://www.vulncheck.com/advisories/musebot-before-2.0.0-authentication-bypass-via-hard-coded-session-key
• https://hackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypass

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