Which versions of Guardian Language System are affected by EUVD-2026-41056?

Guardian Language System contains a critical SQL injection vulnerability (CVE-2026-34099) enabling unauthenticated remote attackers to extract sensitive database contents without authentication.

Is there a public PoC exploit available for EUVD-2026-41056?

Yes, a public proof-of-concept exploit is available for EUVD-2026-41056. Prioritise patching immediately. EPSS: 0.5%.

How to fix or mitigate EUVD-2026-41056?

Within 24 hours: Inventory all Guardian Language System deployments; identify internet-facing instances; enable database query logging and monitoring. Within 7 days: Restrict network access to job_info.php via firewall or Web Application Firewall (WAF) rules; apply principle-of-least-privilege to database service accounts; if business-critical and internet-exposed, consider taking service offline pending patch. Within 30 days: Monitor vendor security advisories for patch release; conduct forensic audit of database logs for exploitation attempts; begin evaluation of patched replacement solutions if vendor does not release fix.

Guardian Language System EUVD-2026-41056

Q: What is the CVSS score of EUVD-2026-41056?

EUVD-2026-41056 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-2026-34099 CRITICAL

SQL Injection (CWE-89)

2026-07-01 VulnCheck

GHSA-gpmw-jvm3-5xc2

PHP SQLi Guardian Language System

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-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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

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. Reported by VulnCheck with a CVSS of 9.3; no public exploit identified as actively used in the wild (not in CISA KEV).

Technical ContextAI

The affected component is a PHP web application (cpe:2.3:a:guardian:language-system) that builds SQL statements through raw string concatenation. Specifically, job_info.php line 16 executes SELECT * FROM jobs where id = '".$_GET['id']."', embedding attacker-controlled input inside a single-quoted string literal without parameterization or escaping. This is a textbook CWE-89 (Improper Neutralization of Special Elements used in an SQL Command) defect: the application trusts a client-supplied GET parameter as trusted SQL syntax, allowing an attacker to break out of the quoted context and append arbitrary SQL clauses. The error-based technique referenced in the description implies the application surfaces database error output, which accelerates data extraction (UNION/error functions returning version(), current_user, information_schema contents).

RemediationAI

No vendor-released patch version was identified in the available data, so remediation should focus on both code fixes and compensating controls. The definitive fix is to rewrite the job_info.php query to use a parameterized/prepared statement (e.g., PDO or mysqli bound parameters) so the id value is never concatenated into SQL, and to cast id to an integer if it is expected to be numeric. Until a fix is deployed, restrict access to job_info.php at the web server or WAF layer, add a WAF rule to reject SQL metacharacters in the id parameter, disable verbose database error output to blunt the error-based extraction technique (trade-off: reduces debugging visibility), and place the application behind authentication or network ACLs to remove unauthenticated exposure (trade-off: may break legitimate anonymous access to job listings). Consult the VulnCheck advisory at https://www.vulncheck.com/advisories/guardian-language-system-unauthenticated-sql-injection-via-id-parameter-in-job-info-php for updates on an official patched release.