CVE-2026-111643: Missing Authentication for Critical Function in l429609201 misaka_danmu_server
Description
Misaka Danmu Server versions up to 2.8.9 have an authentication bypass vulnerability allowing unauthenticated attackers to write arbitrary configuration keys via an unprotected API endpoint. This enables attackers to modify critical settings such as ipWhitelist, trustedProxies, and webhookApiKey, granting administrator-level access to all protected endpoints.
CVSS v4.0
Score 9.3critical
Affected software
l429609201
misaka_danmu_server
pkg:github/misaka_danmu_serverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-111643 describes an authentication bypass vulnerability in Misaka Danmu Server through version 2.8.9. The flaw exists in the POST /api/ui/config-history/rollback endpoint, which lacks authentication controls. Exploiting this, attackers can write arbitrary configuration keys, including setting the ipWhitelist to their own IP address, or altering trustedProxies and webhookApiKey. These changes effectively grant attackers administrator privileges, allowing full access to protected server functions. The vulnerability has a CVSS 4.0 score of 9.3, indicating critical severity.
Potential Impact
Attackers can gain administrator-level access to the Misaka Danmu Server by bypassing authentication and modifying configuration keys. This compromises the confidentiality, integrity, and availability of the server, potentially allowing full control over protected endpoints and sensitive configurations.
Mitigation Recommendations
No patch or official fix information is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict network access to the vulnerable endpoint and monitor for unauthorized configuration changes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-16T14:31:13.864Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad2640f2cdf04f65619956d
Added to database: 10/16/2026, 17:51:11 UTC
Last enriched: 10/16/2026, 18:33:33 UTC
Last updated: 10/16/2026, 19:03:25 UTC
Views: 2
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