CVE-2026-109304 Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 Arbitrary File Read via Twig create() DOMDocument
Attackers can read arbitrary local files by exploiting a missing blocklist for DOMDocument in Twig templates within Craft CMS.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-109304?
CVE-2026-109304 is a medium-severity path traversal vulnerability in craftcms cms, published on 12 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 contains an arbitrary file read vulnerability because the Twig create() class blocklist does not cover DOMDocument. Attackers able to set an entry-type title format, including via project-config/apply, can use create('DOMDocument').loadHTMLFile() with textContent to expose local file contents to non-admin users who can view entries.
Weakness: CWE-200
Which versions are affected by CVE-2026-109304?
How do I fix CVE-2026-109304?
No fix has been published for CVE-2026-109304 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-109304 being exploited?
There is no known exploitation of CVE-2026-109304 in the wild and no public exploit code.
Sources
Also known as GHSA-52mh-mf22-cc6j, GHSA-j5wg-m2pr-35qc.