CVE-2026-111643 PUBLISHED

Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback

Assigner: VulnCheck
Reserved: 16.10.2026 Published: 16.10.2026 Updated: 16.10.2026

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: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 Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

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

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	l429609201
Product	misaka_danmu_server
Versions	Default: unaffected affected from 0 to 2.8.9 (incl.)

CVE-2026-111643 PUBLISHED

Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback

Metrics

Product Status

Credits

References

Problem Types