{"id":"CVE-2026-103396","title":"bbs-go through 4.4.6 contains a permission bypass vulnerability in the AdminMiddleware authorization logic where the read-only dashboard.user.view permission rule matches the /api/admin/user/synccount endpoint before the intended dashboa…","summary":"bbs-go through 4.4.6 contains a permission bypass vulnerability in the AdminMiddleware authorization logic where the read-only dashboard.user.view permission rule matches the /api/admin/user/synccount endpoint before the intended dashboa…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-863"],"vendor":"mlogclub","product":"bbs-go","affected":["bbs-go <= 4.4.6"],"published":"2026-09-30","updated":"2026-09-30","sourceUpdated":"2026-09-30T15:22:28.093","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103396","references":[{"url":"https://github.com/mlogclub/bbs-go","label":"disclosure@vulncheck.com"},{"url":"https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/handlers/admin/user_handlers.go#L47-L59","label":"disclosure@vulncheck.com"},{"url":"https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/permissions/admin_permission_registry.go#L59-L60","label":"disclosure@vulncheck.com"},{"url":"https://github.com/mlogclub/bbs-go/commit/97d0bb3dcbacd686fd5300295afbf4f4a5da7609","label":"disclosure@vulncheck.com"},{"url":"https://github.com/mlogclub/bbs-go/issues/303","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/bbs-go-through-4.4.6-incorrect-authorization-via-api-admin-user-synccount","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-30T15:07:05.378Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-30T16:57:45.943159Z"},"slug":"CVE-2026-103396","body":"## Overview\n\nbbs-go through 4.4.6 contains a permission bypass vulnerability in the AdminMiddleware authorization logic where the read-only dashboard.user.view permission rule matches the /api/admin/user/synccount endpoint before the intended dashboard.user.update rule. Authenticated users with only view permissions can call the synccount endpoint to trigger expensive full-table user recounts and cache invalidations, causing denial of service through repeated concurrent database operations.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}