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TI-2026-35165 Aliases CVE-2026-47657

HumHub Missing Authorization on Remove All Space Members Action

Priority LOW 31CWE-862Published · Updated

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 · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

HumHub is an Open Source Enterprise Social Network. In versions 1.13.0 through 1.18.2, a missing authorization check in the Space member management controller allowed any authenticated user to trigger the removal of all members from any Space, regardless of their own role or membership in that Space. Versions 1.13.0 through 1.18.2 are affected. The vulnerability has been patched in version 1.18.3, and all users are encouraged to upgrade to this version or later immediately. No known workaround is available.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00364 30th percentileScored 2026-11-07
Fix Fixed humhub (humhub): 1.18.3

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

VendorProductAffected versionsFixed inStatusSource
humhubhumhub1.13.0 to before 1.18.31.18.3Patch availableCNA
  • humhub Vendorhumhub Affected 1.13.0 to before 1.18.3 Fixed in 1.18.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:humhub:humhub:*:*:*:*:*:*:*:*——humhub
  • cpe:2.3:a:humhub:humhub:*:*:*:*:*:*:*:* Versions — — ·humhub

Remediation

  • Fix · CNA humhub (humhub) Fixed in 1.18.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-47657

References

Other 2

  • TI-2026-15145 HumHub 1.18.4 - Stored XSS in comment-deletion notifications through unescaped administrator reason CVSS 4.0HIGH 7.2
  • TI-2022-08676 Improper access control in humhub CVSS 3.1MEDIUM 6.5
  • TI-2017-14097 HumHub Reflected cross site scriting CVSS 3.1MEDIUM 6.1
  • TI-2025-34545 Files: Potential for SQL Injection through File Browse and List Operations CVSS 4.0CRITICAL 9.2
  • TI-2017-14099 HumHub privileges management CVSS 3.1CRITICAL 9.8
  • TI-2024-34921 User enumeration in HubHub CVSS 4.0MEDIUM 6.9
See all 24 →

Sources

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