CVE-2026-18986 Entity Browser - Moderately critical - Cross site scripting - SA-CONTRIB-2026-094
Attackers can inject malicious scripts via stored XSS in Drupal Entity Browser, potentially compromising user sessions and site integrity.
- 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
- Available
What is CVE-2026-18986?
CVE-2026-18986 is a medium-severity cross-site scripting vulnerability in Drupal Entity Browser, published on 2 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Entity Browser allows Stored XSS. This issue affects Entity Browser versions: from 0.0.0 to 2.16.0.
Weakness: CWE-79
Which versions are affected by CVE-2026-18986?
It affects 1 product.
Linux distribution packages (1)
drupal/entity_browser Packagist:https://packages.drupal.org/8 | All versions | 2.16.0 |
Products include Entity Browser Project Entity Browser.
How do I fix CVE-2026-18986?
Upgrade to a fixed version.
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-2026-18986 being exploited?
There is no known exploitation of CVE-2026-18986 in the wild and no public exploit code.
Sources
Also known as DRUPAL-CONTRIB-2026-094, GHSA-h52g-f94f-r87h.