Vulnerability details

CVE-2026-111643

l429609201 misaka_danmu_server

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

CVSS 4.0

9.3Critical

Official 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 scores

Score	Version	Source	Vector
9.3Critical	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`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`
9.8Critical	3.1	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
l429609201	misaka_danmu_server	v ≤ 2.8.9	CVEProject cvelistV5 (CNA)

References and advisories

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

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Details

Published: 2026-10-16
Last updated: 2026-10-23
State: Published
Assigner (CNA): VulnCheck
Kolun priority: 26 · Low

Exploit prediction (EPSS)

0.58%

Probability of exploitation in 30 days

48%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-306
Missing Authentication for Critical Function