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Guardian Language System CVE-2026-34099

| EUVDEUVD-2026-41056 CRITICAL
SQL Injection (CWE-89)
2026-07-01 VulnCheck GHSA-gpmw-jvm3-5xc2
SQLi PHP Language System
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

Unauthenticated network-reachable GET parameter with trivial payload gives AV:N/AC:L/PR:N/UI:N; full database read/write/erase via SQLi justifies C:H/I:H/A:H.

3.1 AV:N/AC:L/PR:N/UI:N/S:N/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 - 16:54 vuln.today

DescriptionCVE.org

Guardian language-system passes the id GET parameter directly into an unsanitized SQL query in job_info.php (line 16): SELECT * FROM jobs where id = '\".$_GET['id'].\"'. No authentication is required. An unauthenticated attacker can perform error-based SQL injection to extract the database version, current user, schema names, and table contents.

Articles & Coverage 1

News Critical SQL Injection in PHP Guardian Language System - CVE-2026-34099 Jul 02, 2026

AnalysisAI

Unauthenticated SQL injection in Guardian Language System lets remote attackers manipulate the backend database by injecting into the id GET parameter of job_info.php, which is concatenated directly into a SQL query with no sanitization. Because no authentication is required (CVSS 4.0 PR:N) and publicly available exploit code exists, any attacker who can reach the endpoint can extract database version, current user, schema names, and table contents via error-based injection. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Locate exposed job_info.php endpoint
Delivery
Inject payload into id GET parameter
Exploit
Break out of SQL string literal
Execution
Trigger error-based SQL injection
Impact
Extract version, user, schema, table data
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Vulnerability AssessmentAI

Exploitation The only prerequisite is network reachability to the job_info.php endpoint of a Guardian Language System deployment; per the CVSS vector (AV:N/AC:L/PR:N/UI:N) exploitation is remote, unauthenticated, and requires no user interaction against default configurations. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment All available signals point to a genuine high priority rather than an inflated CVSS. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker discovers a Guardian Language System instance and requests job_info.php?id=1' followed by an error-based injection payload, causing the database to return version and schema data in error messages. Using the publicly available exploit gist, they iterate to dump user tables and credentials without ever authenticating. …
Remediation No vendor-released patch version was identified in the available data, so remediation should focus on both code fixes and compensating controls. … 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; identify internet-facing instances; enable database query logging and monitoring. …

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-2026-34099 vulnerability details – vuln.today
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