SSRF in 1panel-Dev Maxkb
CVE-2026-56779
MaxKB before 2.10.0 contains a server-side request forgery vulnerability in tool creation and update endpoints that allows authenticated users to make arbitrary server requests by supplying unvalidated downloadCallbackUrl and download_url parameters. Attackers with default workspace USER role can exploit this to access internal network services by providing malicious URLs to the ToolSerializer endpoints.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- 1panel-Dev Maxkb — versions 0
Weakness classification (CWE)
References
- Researcher Disclosure (technical-description, exploit)
- Patch Commit (patch)
- www.vulncheck.com/advisories/maxkb-server-side-request-forgery-via-downloadcall… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56779?
- CVE-2026-56779 is a medium-severity vulnerability in 1panel-Dev Maxkb, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.4/10. Published 2026-06-25.
- How severe is CVE-2026-56779?
- Medium severity. CVSS v3 base score is 6.4 out of 10.