What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-16 · updated 2026-10-23
• Weakness: CWE-306

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.

Affected products

• l429609201 misaka_danmu_server: through 2.8.9

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

Get alerted when CVE-2026-111643 or the next vulnerability affects your stack