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CVE-2026-47657

HumHub Missing Authorization on Remove All Space Members Action

HIGH
7.1
CVSS Score
Published: July 21, 2026 at 05:50 PM UTC
Updated: July 23, 2026 at 09:12 PM UTC
1 product affected across 1 vendorHumHub

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Severity
HIGH7.1
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

HumHub· Humhub
60%
v < 1.18.3
Affected range stops below 1.18.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_CONFIRM
Source: cverecord
https://github.com/humhub/humhub/security/advisories/GHSA-hj67-5q6h-j7c2
x_refsource_MISC
Source: cverecord
https://github.com/humhub/humhub/pull/8163

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-862

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