Server-Side Request Forgery in MaxKB by 1Panel
CVE-2026-56779

5.3MEDIUM

Key Information:

Vendor

1panel-dev

Status
Maxkb
Vendor
CVE Published:
25 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-56779?

The MaxKB application, prior to version 2.10.0, contains a vulnerability allowing authenticated users to exploit server-side request forgery. By manipulating unvalidated parameters such as 'downloadCallbackUrl' and 'download_url' within tool creation and update endpoints, attackers with default USER roles can potentially access sensitive internal network services. This vulnerability emphasizes the importance of input validation and secure coding practices to prevent unauthorized access to server resources.

Affected Version(s)

MaxKB 0 < 2.10.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-56779 - Proof of Concept

References

https://github.com/1Panel-dev/MaxKB/issues/6272
technical-descriptionexploit
https://github.com/1Panel-dev/MaxKB/commit/6c156afc656afa...
patch
https://www.vulncheck.com/advisories/maxkb-server-side-re...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.