Which versions of Guardian Language-System are affected by EUVD-2026-41068?

Guardian language-system contains a critical unauthenticated remote code execution vulnerability (CVE-2026-34110, CVSS 9.3) allowing attackers to execute arbitrary commands on affected systems…

How to fix or mitigate EUVD-2026-41068?

WITHIN 24 HOURS: Restrict network access to Guardian complex_start.php to trusted internal networks only via firewall rules; disable the 'id' GET parameter handling if operationally feasible. WITHIN 7 DAYS: Deploy Web Application Firewall (WAF) rules blocking shell metacharacters (|, ;, &, $, `, >, <) in the 'id' parameter; implement enhanced logging of php exec() calls and process spawning from Guardian application; review access logs for exploitation attempts. WITHIN 30 DAYS: Maintain contact with Guardian vendor for patch timeline; prepare emergency patching procedures upon release; conduct security assessment of affected systems for indicators of compromise.

Guardian Language-System EUVD-2026-41068

Q: What is the CVSS score of EUVD-2026-41068?

EUVD-2026-41068 has a CVSS 4.0 base score of 9.3 (Critical). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.5%.

| CVE-2026-34110 CRITICAL

OS Command Injection (CWE-78)

2026-07-01 disclosure@vulncheck.com

GHSA-8jg8-r264-q28x

PHP Command Injection

9.3

CVSS 4.0 · Vendor: vulncheck

Severity by source

Vendor (vulncheck) PRIMARY

9.3 CRITICAL

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

vuln.today AI

9.8 CRITICAL

Unauthenticated network request with unsanitized input reaching exec() gives AV:N/AC:L/PR:N/UI:N; arbitrary command execution yields full C/I/A impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

Primary rating from Vendor (vulncheck).

CVSS VectorVendor: vulncheck

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Jul 01, 2026 - 17:31 vuln.today

DescriptionCVE.org

Guardian language-system passes the id GET parameter directly into a PHP exec() call in complex_start.php (line 14) without sanitization: exec(\"php jobs/complex.php \".$login_session.\" \".$_GET['id'].\" ...\"). No authentication is required. An unauthenticated remote attacker can append shell metacharacters to execute arbitrary OS commands on the server.

AnalysisAI

OS command injection in Guardian language-system allows an unauthenticated remote attacker to execute arbitrary shell commands by injecting metacharacters into the 'id' GET parameter of complex_start.php, which is passed unsanitized into a PHP exec() call. No authentication or user interaction is required, and the CVSS 4.0 score of 9.3 (Critical) reflects full compromise of confidentiality, integrity, and availability. A public gist demonstrating the flaw means publicly available exploit code exists, though it is not listed in CISA KEV.

Technical ContextAI

The vulnerability lies in the PHP web application Guardian language-system, specifically at complex_start.php line 14, where user input is concatenated directly into a shell command string: exec("php jobs/complex.php ".$login_session." ".$_GET['id']." ..."). Because $_GET['id'] flows into the OS command interpreter without escaping or validation, it maps to CWE-78 (Improper Neutralization of Special Elements used in an OS Command / 'OS Command Injection'). PHP's exec() invokes a system shell, so metacharacters such as ;, |, &&, backticks, or $() break out of the intended 'php jobs/complex.php' invocation and are interpreted as independent shell commands running with the privileges of the web server process. No CPE strings were provided, so exact affected package identifiers and versions cannot be enumerated from the intelligence supplied.

RemediationAI

No vendor-released patch version was identified in the provided intelligence, so no exact fix version can be cited; monitor the VulnCheck advisory (https://www.vulncheck.com/advisories/guardian-language-system-unauthenticated-os-command-injection-via-id-parameter-in-complex-start-php) for an official update. As the concrete code-level fix, the id parameter must be strictly validated (for example, allow only the expected numeric or alphanumeric format) and passed via escapeshellarg() or, preferably, refactored so job dispatch does not shell out with user input at all. As immediate compensating controls, restrict or block access to complex_start.php at the web server or WAF layer (for example deny requests where the id parameter contains shell metacharacters such as ; | & $ ` newline), which may break legitimate job-start calls if they use unusual id formats; place the application behind authentication or IP allow-listing since the endpoint currently requires none, at the cost of blocking anonymous users; and run the PHP/web process under a least-privileged account with a restricted shell to limit blast radius if exploited. Because a public PoC exists, apply these controls urgently rather than waiting for a vendor release.