CVE-2026-42335

MEDIUM EPSS 14.0%

Published May 26, 20261mo ago · Modified Jun 17, 20261w ago

6.3 CVSS 4.0

Medium

Published May 26, 2026 1mo ago

Last Modified Jun 17, 2026 1w ago

Description

MaxKB is an open-source AI assistant for enterprise. Prior to 2.8.1, MaxKB v2.8.0 and prior are vulnerable to a server-side request forgery (SSRF) bypass in the OSS file service URL fetch (chat/api/oss/get_url) endpoint. The vulnerability exists due to inconsistent URL parsing between the urlparse validation function and the requests HTTP client, allowing attackers to access internal network services. This vulnerability is fixed in 2.8.1.

CVSS Details

Base Score

6.3

Exploitability

—

Impact

—

Vector string

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

14.0% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-918 Server-Side Request Forgery (SSRF) Validation

References 1

github.com https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-r8hf-mwwr-hxgc

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.