CVE-2026-111643

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/api/ui/config_history.py#L51-L66
https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/security.py#L136-L182
https://hackmd.io/@hieuPenguinnn/misaka-danmu-server-ui-api-missing-authentication
https://www.vulncheck.com/advisories/misaka-danmu-server-through-2.8.9-authentication-bypass-via-config-history-rollback
https://hackmd.io/@hieuPenguinnn/misaka-danmu-server-ui-api-missing-authentication

Configurations

No configuration.

History

23 Oct 2026, 17:17

Type	Values Removed	Values Added
References	~~() https://hackmd.io/@hieuPenguinnn/misaka-danmu-server-ui-api-missing-authentication -~~	() https://hackmd.io/@hieuPenguinnn/misaka-danmu-server-ui-api-missing-authentication -

16 Oct 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-16 18:17

Updated : 2026-10-23 17:17

NVD link : CVE-2026-111643

Mitre link : CVE-2026-111643

CVE.ORG link : CVE-2026-111643

JSON object : View

Products Affected

No product.

CWE

CWE-306

Missing Authentication for Critical Function

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