SSRF in Perfree Go-Fastdfs-Web
CVE-2026-11437
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (34.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Perfree Go-Fastdfs-Web — versions 1.3.0, 1.3.1, 1.3.2
Weakness classification (CWE)
References
- vuldb.com/cve/CVE-2026-11437 (third-party-advisory)
- vuldb.com/submit/822726 (third-party-advisory)
- vuldb.com/vuln/369017 (technical-description, vdb-entry)
- vuldb.com/vuln/369017/cti (signature, permissions-required)
- www.notion.so/Server-Side-Request-Forgery-SSRF-in-go-fastdfs-web-Installation-E… (exploit)
Frequently asked questions
- What is CVE-2026-11437?
- CVE-2026-11437 is a high-severity vulnerability in Perfree Go-Fastdfs-Web, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.3/10. Published 2026-06-06.
- How severe is CVE-2026-11437?
- High severity. CVSS v3 base score is 7.3 out of 10.