CVE-2026-4839
Published: 26 March 2026
Summary
CVE-2026-4839 is a medium-severity Injection (CWE-74) vulnerability in Sourcecodester (inferred from references). Its CVSS base score is 6.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 14.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 RA-5 (Vulnerability Monitoring and Scanning) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2026-4839 is a SQL injection vulnerability (CWE-74, CWE-89) in SourceCodester Food Ordering System 1.0, affecting an unknown function within the /purchase.php file of the Parameter Handler component. The flaw is triggered by manipulation of the 'custom' argument, allowing remote attackers to inject malicious SQL payloads.
Attackers require no privileges or user interaction and can exploit this remotely with low complexity, per its CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L). Successful exploitation enables limited impacts on confidentiality, integrity, and availability, such as unauthorized data access, modification, or disruption. The exploit has been publicly disclosed and may be used by threat actors.
Advisories from VulDB (https://vuldb.com/?ctiid.353142, https://vuldb.com/?id.353142, https://vuldb.com/?submit.776082) and a GitHub proof-of-concept (https://github.com/WHOAMI-xiaoyu/CVE/blob/main/CVE_9.md) provide further details, while the vendor site (https://www.sourcecodester.com/) hosts the affected software. No specific patches are detailed in the available information.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-16085
Vulnerability details
A 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…
more
remotely. The exploit has been disclosed to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct remote SQL injection in a web application (purchase.php parameter) enables initial access via exploitation of a public-facing or remotely reachable app with no auth required.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly prevents SQL injection by requiring validation of untrusted inputs like the 'custom' argument in /purchase.php before database processing.
Requires timely identification, reporting, and patching of the specific SQL injection flaw in the Parameter Handler component.
Enables vulnerability scanning to identify SQL injection issues like CVE-2026-4839, including publicly disclosed PoCs targeting the 'custom' parameter.