dbcve.org
InjectionWeakness · CWE-74

CVE-2026-8126

HIGH · 7.3 CVSS v3.1 Published 2026-05-08
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
82/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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 · unedited
A flaw has been found in SourceCodester Comment System 1.0. This issue affects some unknown processing of the file post_comment.php. This manipulation of the argument Name causes sql injection. Remote exploitation of the attack is possible. The exploit has been published and may be used.

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 confidence

SQL injection vulnerability in SourceCodester Comment System 1.0's post_comment.php file. The 'Name' parameter is not properly sanitized before being used in database queries, allowing remote attackers to inject malicious SQL commands.

MitigationReplace dynamic SQL query construction with prepared statements/parameterized queries, or implement proper input validation and escaping on the Name parameter before database execution.

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
Low
Integrity
Low
Availability
Low

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

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 checks

Work through these to decide whether this CVE applies to you.

  1. Locate the post_comment.php file
    Search your web server directories for the file 'post_comment.php' that belongs to SourceCodester Comment System. Common paths may include /var/www/html/, /www/, or your webroot directory. Use: find / -name 'post_comment.php' 2>/dev/null
    Affected if The file exists and is part of SourceCodester Comment System 1.0
  2. Verify the application version
    Check for version indicators in the application. Look for a 'version' file, readme.txt, or check the source code comments in post_comment.php for version metadata. Compare your installed version against the affected version 1.0
    Affected if The installed version is SourceCodester Comment System 1.0
  3. Inspect the Name parameter handling in post_comment.php
    Open post_comment.php and locate the code handling the 'Name' or 'name' form parameter. Search for $_POST['name'] or $_REQUEST['name'] usage. Check if the value is directly inserted into SQL queries without sanitization functions like mysqli_real_escape_string, prepared statements, or parameter binding
    Affected if The Name parameter is used in SQL queries without proper escaping, parameterization, or input validation
  4. Check if the comment submission form is accessible
    Determine if the comment form that submits to post_comment.php is publicly accessible on your web server. Identify the form HTML and verify the action points to post_comment.php with a 'Name' input field
    Affected if The comment form with the vulnerable Name field is exposed and functional on your server
  5. Test for SQL injection vulnerability
    If you have authorized access, submit a test comment with a Name value containing SQL metacharacters such as: ' OR '1'='1. Check if the application returns SQL errors or behaves unexpectedly indicating unsanitized input is being executed as SQL
    Affected if The application exhibits SQL error messages or unexpected behavior confirming SQL injection is possible

You are affected if you have SourceCodester Comment System 1.0 installed with the post_comment.php file present and the Name parameter is used in SQL queries without prepared statements or proper escaping.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Replace dynamic SQL query construction with prepared statements/parameterized queries, or implement proper input validation and escaping on the Name parameter before database execution.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,840
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-8126 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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