CVE-2026-103396
bbs-go through 4.4.6 Incorrect Authorization via /api/admin/user/synccount
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 30, 2026
- Updated
- Sep 30, 2026
- Reserved
- Sep 30, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L | VulnCheck |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
bbs-gomlogclub |
|
References
- GitHub Issue #303issue-tracking
- https://github.com/mlogclub/bbs-go/commit/97d0bb3dcbacd686fd5300295afbf4f4a5da7609patch
- https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/permissions/admin_permission_registry.go#L59-L60technical-description
- https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/handlers/admin/user_handlers.go#L47-L59technical-description
- https://github.com/mlogclub/bbs-goproduct
- VulnCheck Advisory: bbs-go through 4.4.6 Incorrect Authorization via /api/admin/user/synccountthird-party-advisory
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