CVE-2026-34110
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedGuardian 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Guardian language-system contains a command injection vulnerability in complex_start.php where the 'id' GET parameter is passed directly to a PHP exec() call without any sanitization or escaping. An unauthenticated attacker can append shell metacharacters to the id parameter to execute arbitrary OS commands on the server.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Locate the Guardian language-system installationSearch the web server document root for a directory or application named 'guardian' or 'language-system'. Common paths include /var/www/html/, /www/, or the web server's document root. Look for a file named complex_start.php.Affected if The Guardian language-system with complex_start.php exists on the server
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Verify complex_start.php contains the exec() callOpen complex_start.php and examine line 14 (or nearby lines) for a PHP exec() function call that references a variable named 'id' from $_GET['id'] or similar. Search for patterns like exec($cmd) or exec($_GET['id']).Affected if The file contains an exec() call using the 'id' parameter without visible sanitization functions like htmlspecialchars, escapeshellarg, or preg_replace
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Confirm lack of input sanitization on the id parameterReview the code before the exec() call to check if $_GET['id'] is passed through sanitization functions such as escapeshellarg(), escapeshellcmd(), or a validation allowlist. Also check for any filtering or validation logic.Affected if The 'id' parameter is used directly in exec() or only superficially validated without proper shell metacharacter escaping
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Test if the vulnerable parameter is accessibleVerify that complex_start.php is accessible via the web server without authentication. Check if the file can be reached via HTTP GET requests to the application's endpoint.Affected if The file is reachable without authentication and accepts GET parameters
The server is affected if the Guardian language-system is installed with complex_start.php containing an unsanitized exec() call on the 'id' GET parameter that can be reached without authentication.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement strict input validation and sanitization for the id parameter before use in exec(), or replace the exec() call with a safer alternative such as proc_open() with explicit argument separation, or use a whitelist approach for acceptable input values.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-34110 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-34110 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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