CVEvulnerability

CVE-2026-39419

3.1 LOW Published 2026-04-14 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-04-14
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
3.1 LOW — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Weaknesses
CWE-290, CWE-693, CWE-74

Description

MaxKB is an open-source AI assistant for enterprise. In versions 2.7.1 and below, an authenticated user can bypass sandbox result validation and spoof tool execution results by exploiting Python frame introspection to read the wrapper's UUID from its bytecode constants, then writing a forged result directly to file descriptor 1 (bypassing stdout redirection). By calling sys.exit(0), the attacker terminates the wrapper before it prints the legitimate output, causing the MaxKB service to parse and trust the spoofed response as the genuine tool result. This issue has been fixed in version 2.8.0.

Affected configurations

• maxkb maxkb (< 2.8.0)

Related

Weakness · CWE (3)

  • CWE-290 Authentication Bypass by Spoofing weakness
  • CWE-693 Protection Mechanism Failure weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component weakness

References