TI-2026-65682 Aliases CVE-2026-103396 GHSA-wr27-gh7c-5q9v

bbs-go through 4.4.6 Incorrect Authorization via /api/admin/user/synccount

LOW 24CWE-863Published 2026-09-30 · Updated 2026-09-30

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: None · None · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-863.

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 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00286 21st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
mlogclub	bbs-go	up to 4.4.6	—	No fix listed	CNA

bbs-go Vendormlogclub Affected up to 4.4.6 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-103396
2026-10-03 Alias added: GHSA-wr27-gh7c-5q9v

References

Patch 1

https://github.com/mlogclub/bbs-go/commit/97d0bb3dcbacd686fd5300295afbf4f4a5da7609

Other 4

TI-2026-75425 bbs-go Account Takeover via Google One Tap Login CVSS 4.0HIGH 8.6
TI-2026-84345 Improper TLS certificate validation in bbs-go SMTP email service CVSS 4.0HIGH 8.3
TI-2026-71989 Stored cross-site scripting in bbs-go via spoofed upload Content-Type CVSS 4.0MEDIUM 5.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences