What’s Vulnerable › Vulnerabilities

CVE-2026-56779: MaxKB < 2.10.0 - Server-Side Request Forgery via downloadCallbackUrl and download_url Parameters

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-25 · updated 2026-10-25
• Weakness: CWE-918

Description

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.

Affected products

• 1Panel-dev MaxKB: before 2.10.0 — fixed in 2.10.0

How to fix

Upgrade to a fixed version: 1Panel-dev MaxKB 2.10.0. Check the vendor advisory for mitigations.

References

• https://github.com/1Panel-dev/MaxKB/commit/6c156afc656afa62ea4280e504a06ac1c9696b36
• https://github.com/1Panel-dev/MaxKB/issues/6272
• https://www.vulncheck.com/advisories/maxkb-server-side-request-forgery-via-downloadcallbackurl-and-download-url-parameters

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