CVE-2026-0591
Published: 05 January 2026
Summary
CVE-2026-0591 is a medium-severity Injection (CWE-74) vulnerability in Fabian Online Product Reservation System. Its CVSS base score is 5.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 23.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2026-0591 is a SQL injection vulnerability (CWE-74, CWE-89) in code-projects Online Product Reservation System 1.0. The affected component is the Cart Update Handler, specifically an unknown function in the file /app/checkout/update.php, which improperly handles the arguments id and qty, enabling SQL injection.
The vulnerability allows remote exploitation by an authenticated attacker with low privileges (PR:L). Per the CVSS v3.1 base score of 6.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L), successful attacks can result in low-level impacts to confidentiality, integrity, and availability, such as unauthorized data access or modification via injected SQL payloads.
Advisories on VulDB (ctiid.339501, id.339501) and GitHub repositories document the issue, with a publicly available proof-of-concept exploit demonstrating SQL injection in the checkout update endpoint.
The exploit is hosted on GitHub under foeCat/CVE/OnlineProductReservation_PHP/sqli_checkout_update.php.md, including POC details, increasing the risk of real-world abuse.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-0853
Vulnerability details
A vulnerability was identified in code-projects Online Product Reservation System 1.0. The impacted element is an unknown function of the file /app/checkout/update.php of the component Cart Update Handler. Such manipulation of the argument id/qty leads to sql injection. It is…
more
possible to launch the attack remotely. The exploit is publicly available and might be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
SQL injection in a web app's checkout handler directly enables remote exploitation of a public-facing application (T1190) by authenticated attackers via crafted id/qty parameters.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation of id/qty inputs in update.php to reject SQL metacharacters before they reach the database.
Mandates timely remediation of the known SQL injection flaw in the Cart Update Handler once the public exploit is disclosed.
Enables monitoring of database query patterns and error responses from /app/checkout/update.php to identify active SQL injection attempts.