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 4.0

9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-25)

CWE

CWE-306

Published

2026-10-16

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

References

• 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

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