CVE-2026-93769 Cross-site scripting in Humhub
A stored XSS vulnerability in HumHub allows users with Manage Users permission to inject scripts into profile field titles, potentially leading to system administrator account takeover.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-93769?
CVE-2026-93769 is a high-severity cross-site scripting vulnerability in Humhub, published on 23 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
HumHub 1.18.5 is affected by a stored cross-site scripting (XSS) vulnerability that allows any user holding the delegated, non-system-administrator Manage Users permission (admin_manage_users) to inject persistent HTML/JavaScript into a Profile Field Category title.
Weakness: CWE-79
Which versions are affected by CVE-2026-93769?
How do I fix CVE-2026-93769?
No fix has been published for CVE-2026-93769 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-93769 being exploited?
There is no known exploitation of CVE-2026-93769 in the wild and no public exploit code.