PT-2026-32578 · 1Panel Dev · Maxkb

Shaohuzhang1 · Published 2026-04-14 · Updated 2026-04-14 · CVE-2026-39424

Mitre

CVSS v4.0

5.3

Medium

AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

MaxKB is an open-source AI assistant for enterprise. In versions 2.7.1 and below, the chat export feature is vulnerable to Improper Neutralization of Formula Elements in a CSV File. When an administrator exports the application chat history to an Excel file (.xlsx) via the /admin/api/workspace/{workspace id}/application/{application id}/chat/export endpoint, strings starting with formula characters are written directly without proper sanitization. Opening this file in spreadsheet applications like Microsoft Excel can lead to Arbitrary Code Execution (RCE) on the administrator's workstation via Dynamic Data Exchange (DDE). The issue is a variant of CVE-2025-4546, which fixed the exact same pattern in apps/dataset/serializers/document serializers.py but missed the application chat export sink. This issue has been fixed in version 2.8.0.

Fix

RCE

Weakness Enumeration

CWE-1236

Related Identifiers

CVE-2026-39424

Affected Products

Maxkb

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-39424 · Security Note
• https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-rr4r-7cj2-29vp · Note
• https://github.com/1Panel-dev/MaxKB/commit/24cd68acae5f726eed828e2ac801827a2a70536f · Note
• https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0 · Note
• https://twitter.com/CVEnew/status/2043976149651406971 · Twitter Post
• https://twitter.com/CVEarity/status/2044101121841737736 · Twitter Post