CVE-2026-103396
bbs-go through 4.4.6 Incorrect Authorization via /api/admin/user/synccount
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
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 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.
| CWE | CWE-863 |
| Vendor | mlogclub |
| Product | bbs-go |
| Published | Sep 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
mlogclub / bbs-go
0 ≤ 4.4.6
References
github.com: https://github.com/mlogclub/bbs-go/issues/303 github.com: https://github.com/mlogclub/bbs-go/commit/97d0bb3dcbacd686fd5300295afbf4f4a5da7609 github.com: https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/permissions/admin_permission_registry.go#L59-L60 github.com: https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/handlers/admin/user_handlers.go#L47-L59 github.com: https://github.com/mlogclub/bbs-go vulncheck.com: https://www.vulncheck.com/advisories/bbs-go-through-4.4.6-incorrect-authorization-via-api-admin-user-synccount
Credits
George Chen