CVE-2026-4839
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 · uneditedA vulnerability has been found in SourceCodester Food Ordering System 1.0. This affects an unknown function of the file /purchase.php of the component Parameter Handler. The manipulation of the argument custom leads to sql injection. The attack can be initiated remotely. The exploit has been disclosed to the public 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 confidenceSQL injection vulnerability in SourceCodester Food Ordering System 1.0 allows remote attackers to inject malicious SQL queries via the 'custom' parameter in /purchase.php. The Parameter Handler component fails to properly sanitize user input before using it in database queries, enabling attackers to manipulate SQL statements.
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 checksWork through these to decide whether this CVE applies to you.
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Identify the installed productLocate and inspect the web application files to confirm it is SourceCodester Food Ordering System. Check for application files, readme, or version identifiers.Affected if The application is not SourceCodester Food Ordering System
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Verify the product versionCheck the application's version file, readme, header, or database configuration for version number '1.0'. Compare against known version information.Affected if The installed version is not 1.0 (versions other than 1.0 may have different exposure)
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Locate purchase.phpSearch the web root for the file /purchase.php and confirm it exists in the application structure.Affected if The file purchase.php does not exist in the application
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Inspect the custom parameter handlingOpen purchase.php and search for code that handles the 'custom' parameter. Look for where $_GET, $_POST, or $_REQUEST retrieves this parameter for use in SQL queries.Affected if The 'custom' parameter is not present or not used in database queries within purchase.php
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Check for unsanitized SQL usageReview the code around the 'custom' parameter usage. Look for direct concatenation or insertion of this parameter into SQL statements without using prepared statements, parameter binding, or input sanitization functions.Affected if The 'custom' parameter is directly concatenated into SQL queries without sanitization or prepared statements
The environment is affected if it runs SourceCodester Food Ordering System version 1.0 with purchase.php containing the vulnerable 'custom' parameter used in unsanitized SQL queries.
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 dataReplace dynamic SQL queries with prepared statements/parameterized queries in purchase.php, validate and sanitize all user inputs, and implement proper input validation before database operations.
- Consultation2.0 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 $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-4839 — 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-2026-4839 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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