CVE-2026-111643
Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback
- State
- Published
- Severity
- 9.3 Critical
- Published
- Oct 16, 2026
- Updated
- Oct 23, 2026
- Reserved
- Oct 16, 2026
Description
Misaka Danmu Server through 2.8.9 contains an authentication bypass vulnerability that allows unauthenticated attackers to write arbitrary configuration keys via the unprotected POST /api/ui/config-history/rollback endpoint. Attackers can set the ipWhitelist key to their own /32 address, or alter trustedProxies and webhookApiKey, to access every protected endpoint as the administrator.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | 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 | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-306 Missing Authentication for Critical Function
Affected Products
| Product | Versions |
|---|---|
misaka_danmu_serverl429609201 |
|
References
- https://hackmd.io/@hieuPenguinnn/misaka-danmu-server-ui-api-missing-authenticationthird-party-advisory
- https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/api/ui/config_history.py#L51-L66technical-description
- https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/security.py#L136-L182technical-description
- VulnCheck Advisory: Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollbackthird-party-advisory
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