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CVE-2026-111643— Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback

Quick assessment

Affected
l429609201 misaka_danmu_server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Misaka Danmu Server 2.8.9 及以下版本存在一个认证绕过漏洞。未认证的攻击者可通过未受保护的 POST /api/ui/config-history/rollback 接口写入任意配置项。攻击者可设置 ipWhitelist 为自身的 /32 网段地址，或修改 trustedProxies 和 webhookApiKey，从而以管理员身份访问所有受保护接口。

CVSS 9.8 · Critical EPSS 0.45% · P37

Affected Version Matrix 1

VendorProduct Version RangeStatus
l429609201 misaka_danmu_server ≤ 2.8.9 affected
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I. Basic Information for CVE-2026-111643

Vulnerability Information
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Vulnerability Title
Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
l429609201 misaka_danmu_server 0 ~ 2.8.9 -

II. Public POCs for CVE-2026-111643

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-111643

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Vendor Advisories for CVE-2026-111643 (1)

Security Blog Posts for CVE-2026-111643 (1)

Other References for CVE-2026-111643 (1)

IV. Related Vulnerabilities

Same product: misaka_danmu_server
Same vendor: l429609201
Same weakness: CWE-306

V. Comments for CVE-2026-111643

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