CVE-2026-18430
High
Description
HumHub 1.18.4 contains a stored cross-site scripting vulnerability in the comment-deletion notification flow. A Space administrator can delete another user's comment, choose to notify the original author, and place HTML/JavaScript in the deletion reason.
SeverityHigh
CVSS7.2
Exploit probability—
Product
HumHub
PublishedAug 19, 2026
First seenAug 19, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| HumHub HumHub | 1.18.4 | — |
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