Critical severity · published Oct 16, 2026
CVE-2026-111643
Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback
9.8
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MI
misaka_danmu_server · l429609201
through 2.8.9 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111643
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111643
github.com
https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/api/ui/config_history.py#L51-L66
github.com
https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/security.py#L136-L182
hackmd.io
https://hackmd.io/@hieuPenguinnn/misaka-danmu-server-ui-api-missing-authentication
www.vulncheck.com
https://www.vulncheck.com/advisories/misaka-danmu-server-through-2.8.9-authentication-bypass-via-config-history-rollback
More from misaka_danmu_server
7.3
CVE-2026-111644
Misaka Danmu Server through 2.8.9 Missing Authentication on /api/ui Routes