CVE-2026-39419

Published: Apr 14, 2026 Last Modified: Apr 14, 2026
ExploitDB:
Other exploit source:
Google Dorks:
LOW 3,1
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: low
Availability: none

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0005
Percentile
0,1th
Updated

EPSS Score Trend (Last 3 Days)

74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Incomplete
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Access Control Other Integrity Non-Repudiation
Potential Impacts:
Read Application Data Bypass Protection Mechanism Alter Execution Logic Other Hide Activities
Applicable Platforms
All platforms may be affected
Likelihood of Exploit: High
View CWE Details
290

Authentication Bypass by Spoofing

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Bypass Protection Mechanism Gain Privileges Or Assume Identity
Applicable Platforms
All platforms may be affected
View CWE Details
693

Protection Mechanism Failure

Draft
Abstraction: Pillar Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Bypass Protection Mechanism
Applicable Platforms
Technologies: ICS/OT, Not Technology-Specific
View CWE Details
https://github.com/1Panel-dev/MaxKB/commit/38c4cfecd065293e…
https://github.com/1Panel-dev/MaxKB/commit/38c4cfecd065293ede0437f6fa76cf011659…
https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0
https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0
https://github.com/1Panel-dev/MaxKB/security/advisories/GHS…
https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-f3c8-p474-xwfv