CVE-2026-18526
HumHub 1.18.4 / 1.18.4-pl1 – Stored Cross-Site Scripting in oEmbed confirmation
HIGH
7.4
CVSS Score
Published: August 19, 2026 at 02:17 PM UTC
Updated: October 27, 2026 at 12:10 PM UTC
1 product affected across 1 vendorHumHub
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Severity
HIGH7.4
Exploit prediction
EPSS 0.5%
SSVC
No known exploit
Description
HumHub Community Edition 1.18.4 and 1.18.4-pl1 contain a stored Cross-Site Scripting (XSS) vulnerability in the oEmbed confirmation rendering workflow.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (3)
SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.4HIGHFluid Attacks
Vector?
Quick Info
StatusDEFERRED
CWE
CWE-79
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