CVE-2026-111643CWE-306

CVE-2026-111643

Critical · published October 16, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
37.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · 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
EPSS
0.00445 · 37.7th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-10-16T22:17Z
References (5)
https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/api/ui/config_history.py#L51-L66 · [email protected]https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/security.py#L136-L182 · [email protected]https://hackmd.io/@hieuPenguinnn/misaka-danmu-server-ui-api-missing-authentication · [email protected]https://www.vulncheck.com/advisories/misaka-danmu-server-through-2.8.9-authentication-bypass-via-config-history-rollback · [email protected]https://hackmd.io/@hieuPenguinnn/misaka-danmu-server-ui-api-missing-authentication · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 16 OCT 17:39Z
    Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback
    cvelistv5
  • 16 OCT 17:39Z
    Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback
    cvelistv5