CVE-2026-11437 perfree go-fastdfs-web Installation Endpoint checkServer server-side request forgery
Remote attackers can exploit the installation endpoint to perform server-side request forgery, potentially accessing internal resources.
- 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-2026-11437?
CVE-2026-11437 is a medium-severity server-side request forgery vulnerability in perfree go-fastdfs-web, published on 6 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw has been found in perfree go-fastdfs-web up to 1.3.7. Affected is the function checkServer of the file /install/checkServer of the component Installation Endpoint. Executing a manipulation can lead to server-side request forgery. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-918
Which versions are affected by CVE-2026-11437?
How do I fix CVE-2026-11437?
No fix has been published for CVE-2026-11437 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-11437 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11437 exists.
Sources
Also known as GHSA-6g49-gvr8-2cj2.