CVE-2026-31266 Missing authorization in n/a
An attacker can access the migrate endpoint without authorization, potentially modifying application state or escalating privileges in Craft CMS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-31266?
CVE-2026-31266 is a high-severity missing authorization vulnerability in n/a, published on 27 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Craft CMS 5.9.5 and earlier contains a Missing Authorization vulnerability in the migrate endpoint (/actions/app/migrate).
Weakness: CWE-862
Which versions are affected by CVE-2026-31266?
How do I fix CVE-2026-31266?
No fix has been published for CVE-2026-31266 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-31266 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-31266 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-xmjj-hvvj-3jr6.