CVE-2026-90770: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in openspug spug
Spug through 3.4.0 contains a remote code execution vulnerability in the ping_check function that interpolates user-supplied monitor addresses directly into shell commands without validation. Authenticated users with monitor permissions can inject shell metacharacters via the /monitor/run_test/ endpoint to execute arbitrary commands as the Spug process user.
AI Analysis
Technical Summary
The vulnerability in openspug spug (<=3.4.0) involves improper neutralization of special elements in OS commands, specifically in the ping_check function. This allows authenticated users with monitor permissions to inject shell metacharacters through the /monitor/run_test/ endpoint, leading to arbitrary command execution with the privileges of the Spug process user. The CVSS 4.0 score is 8.7, indicating a high severity remote code execution flaw with low attack complexity and no user interaction required.
Potential Impact
Successful exploitation allows an authenticated user with monitor permissions to execute arbitrary OS commands on the server running Spug, potentially compromising the system integrity and confidentiality. The commands run with the privileges of the Spug process user, which could lead to full system compromise depending on that user's permissions.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict monitor permissions to trusted users only and consider additional access controls to limit exposure.
CVE-2026-90770: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in openspug spug
Description
Spug through 3.4.0 contains a remote code execution vulnerability in the ping_check function that interpolates user-supplied monitor addresses directly into shell commands without validation. Authenticated users with monitor permissions can inject shell metacharacters via the /monitor/run_test/ endpoint to execute arbitrary commands as the Spug process user.
CVSS v4.0
Score 8.7high
Affected software
openspug
spug
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in openspug spug (<=3.4.0) involves improper neutralization of special elements in OS commands, specifically in the ping_check function. This allows authenticated users with monitor permissions to inject shell metacharacters through the /monitor/run_test/ endpoint, leading to arbitrary command execution with the privileges of the Spug process user. The CVSS 4.0 score is 8.7, indicating a high severity remote code execution flaw with low attack complexity and no user interaction required.
Potential Impact
Successful exploitation allows an authenticated user with monitor permissions to execute arbitrary OS commands on the server running Spug, potentially compromising the system integrity and confidentiality. The commands run with the privileges of the Spug process user, which could lead to full system compromise depending on that user's permissions.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict monitor permissions to trusted users only and consider additional access controls to limit exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-13T10:14:52.802Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa682ac55bf5e2cf583e18d
Added to database: 09/13/2026, 11:02:04 UTC
Last enriched: 09/13/2026, 11:16:47 UTC
Last updated: 09/14/2026, 01:44:28 UTC
Views: 16
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