Vulnerability details
CVE-2026-119660
yincongcyincong MuseBot
MuseBot before 2.0.0 Authentication Bypass via Hard-Coded Session Key
CVSS 4.0
9.3Critical
Official description
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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.3Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| yincongcyincong | MuseBot | v < 2.0.0 | CVEProject cvelistV5 (CNA) |
References and advisories
8- https://github.com/yincongcyincong/MuseBot/issues/61 issue-tracking
- https://github.com/yincongcyincong/MuseBot/commit/3e64518948fe7037058f07ef987d35216c3f0cae patch
- https://github.com/yincongcyincong/MuseBot/commit/139f6158b50283b983d76976f593a3a09a064681 patch
- https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/conf/conf.go#L28 technical-description
- https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/controller/login.go#L19-L88 technical-description
- https://github.com/yincongcyincong/MuseBot product
- https://www.vulncheck.com/advisories/musebot-before-2.0.0-authentication-bypass-via-hard-coded-session-key third-party-advisory
- https://hackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypass third-party-advisory
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Details
- Published
- 2026-10-30
- Last updated
- 2026-11-06
- State
- Published
- Assigner (CNA)
- VulnCheck
- Kolun priority
- 25 · Low
Exploit prediction (EPSS)
0.52%
Probability of exploitation in 30 days
44.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-1394Use of Default Cryptographic Key