Quick answers
- Is CVE-2026-103396 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-103396 being exploited in the wild.
- How severe is CVE-2026-103396?
- Medium severity, with a CVSS score of 4.3, published 30 September 2026.
- Which products and versions are affected?
- Mlogclub Bbs-Go through 4.4.6.
- Is there a fix for CVE-2026-103396?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-103396 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-103396?
- Check whether you run Mlogclub Bbs-Go at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A permission bypass exists 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, due to incorrect rule ordering. Authenticated users with view-only permissions can invoke the synccount endpoint to trigger full-table user recounts and cache invalidations, causing denial of service through repeated concurrent database operations.
Affected products
- mlogclub bbs-go through 4.4.6
Timeline
- 2026-09-30: disclosed