CVE-2026-85603 Grav Admin Plugin Path Traversal via Save As Language Code
Authenticated admin users can exploit path traversal in the Save As action to write arbitrary markdown files outside the intended directory.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85603?
CVE-2026-85603 is a high-severity path traversal vulnerability in getgrav grav, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Grav versions before 1.10.55 contain a path traversal vulnerability in the admin plugin's Save As action that fails to validate the language code parameter. An authenticated admin user with admin.pages.create permission can supply directory traversal sequences in the lang POST field to write arbitrary .md files outside the pages directory with attacker-controlled content.
Weakness: CWE-73
Which versions are affected by CVE-2026-85603?
How do I fix CVE-2026-85603?
No fix has been published for CVE-2026-85603 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-2026-85603 being exploited?
There is no known exploitation of CVE-2026-85603 in the wild and no public exploit code.
Sources
Also known as GHSA-67xf-jwpx-5m9q.