CVE-2026-111643 Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback
Unauthenticated attackers can bypass authentication by modifying configuration keys via an unprotected endpoint, gaining administrator access to the Misaka Danmu Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111643?
CVE-2026-111643 is a critical authentication bypass vulnerability in l429609201 misaka_danmu_server, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-306
Which versions are affected by CVE-2026-111643?
How do I fix CVE-2026-111643?
No fix has been published for CVE-2026-111643 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-111643 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111643 exists.
Sources
Also known as GHSA-h9w3-vw4p-h6vw.