---
id: CVE-2026-56779
title: >-
  MaxKB < 2.10.0 - Server-Side Request Forgery via downloadCallbackUrl and
  download_url Parameters
summary: >-
  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_ur…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-918
vendor: 1Panel-dev
product: MaxKB
affected:
  - MaxKB < 2.10.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-30T03:27:15.336872Z'
exploitAvailable: true
published: '2026-06-25'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:06:21.953Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-56779'
references:
  - url: 'https://github.com/1Panel-dev/MaxKB/issues/6272'
    label: Researcher Disclosure
  - url: >-
      https://github.com/1Panel-dev/MaxKB/commit/6c156afc656afa62ea4280e504a06ac1c9696b36
    label: Patch Commit
  - url: >-
      https://www.vulncheck.com/advisories/maxkb-server-side-request-forgery-via-downloadcallbackurl-and-download-url-parameters
tags:
  - cve.org
  - exploit-available
epss: 0.00294
epssPercentile: 0.22189
ingestedAt: '2026-11-08T14:51:22.336Z'
---

## Overview

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

- `MaxKB < 2.10.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.