PT-2026-78374 · Humhub+1 · Humhub

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CVE-2026-18526

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Published

2026-08-19

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Updated

2026-08-19

CVSS v4.0

7.4

High

VectorAV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
Name of the Vulnerable Software and Affected Versions HumHub Community Edition versions 1.18.4 and 1.18.4-pl1
Description A stored Cross-Site Scripting (XSS) issue exists in the oEmbed confirmation rendering workflow. XSS is a flaw that allows an attacker to inject malicious scripts into content that is then served to other users.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

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Weakness Enumeration

Related Identifiers

CVE-2026-18526

Affected Products

Humhub