{"id":"CVE-2026-111643","title":"Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback","summary":"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 ca…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-306"],"vendor":"l429609201","product":"misaka_danmu_server","affected":["misaka_danmu_server <= 2.8.9"],"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T17:39:13.043Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111643","references":[{"url":"https://hackmd.io/@hieuPenguinnn/misaka-danmu-server-ui-api-missing-authentication"},{"url":"https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/api/ui/config_history.py#L51-L66"},{"url":"https://github.com/l429609201/misaka_danmu_server/blob/v2.8.9/src/security.py#L136-L182"},{"url":"https://www.vulncheck.com/advisories/misaka-danmu-server-through-2.8.9-authentication-bypass-via-config-history-rollback","label":"VulnCheck Advisory: Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback"}],"tags":["cve.org"],"ingestedAt":"2026-10-16T18:43:08.680Z","slug":"CVE-2026-111643","body":"## Overview\n\nMisaka 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.\n\n## Affected\n\n- `misaka_danmu_server <= 2.8.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}