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CVE-2026-39423

Stored XSS via Eval Injection in EchartsRander Component

Published: Apr 14, 2026Updated: Apr 20, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
5.4CVSSMEDIUM
EPSS Score
0.2%
Top 93.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

MaxKB is an open-source AI assistant for enterprise. Versions 2.7.1 and below contain an Eval Injection vulnerability in the Markdown rendering engine that allows any user capable of interacting with the AI chat interface to execute arbitrary JavaScript in the browsers of other users, including administrators, resulting in Stored Cross-Site Scripting (XSS). This issue has been fixed in version 2.8.0.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79CWE-95

Affected Products

MaxKB1Panel-dev
On-prem
Cloud & SaaS / cloud-platform
maxkbmaxkb
On-prem
Enterprise Software / collaboration-groupware
1panel-devoss-projectCNCloud & SaaSaka 1panel
maxkbEnterprise Softwareaka maxkb

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-462x-99gf-mp79
github.com
https://github.com/1Panel-dev/MaxKB/commit/34fb95bde9574c5b3a734ab00c7f29b9e7d32669
github.com
https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0
github.com

Timeline

Published
Apr 14, 2026
Last Updated
Apr 20, 2026

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