CVE-2026-84423 Casdoor upload-resource API resource.go missing authentication
Attackers can upload resources to Casdoor without authentication, potentially modifying data or bypassing security controls.
- 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-2026-84423?
CVE-2026-84423 is a medium-severity missing authorization vulnerability in Casdoor, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been found in Casdoor up to 4.0.0. This affects an unknown function of the file controllers/resource.go of the component upload-resource API. Such manipulation leads to missing authentication. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor deleted the GitHub issue for this vulnerability without any explanation. Afterwards the vendor was contacted early about this disclosure via email but did not respond in any way.
Which versions are affected by CVE-2026-84423?
How do I fix CVE-2026-84423?
No fix has been published for CVE-2026-84423 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-2026-84423 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84423 exists.
Sources
Also known as GHSA-ghh7-j2mm-r3r8.