CVE-2026-42335

MaxKB: SSRF Bypass in MaxKB OSS URL Fetch due to URL Parsing Discrepancy

MEDIUM

6.3

CVSS Score

Published: May 26, 2026 at 08:09 PM UTC

Updated: July 23, 2026 at 07:32 PM UTC

1 product affected across 1 vendorMaxKB

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Severity

MEDIUM6.3

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

MaxKB · 1PANEL Dev

60%

v < 2.8.1

Affected range stops below 2.8.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRM

Source: cverecord

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMGitHub_M

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-918

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