Which versions of PHP are affected by CVE-2026-0591?

Organizations using A vulnerability should be aware of moderate risk from CVE-2026-0591, a injection vulnerability rated CVSS 6.3.

Is there a public PoC exploit available for CVE-2026-0591?

Yes, a public proof-of-concept exploit is available for CVE-2026-0591. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-0591?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

PHP CVE-2026-0591

Q: What is the CVSS score of CVE-2026-0591?

CVE-2026-0591 has a CVSS 4.0 base score of 2.1 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

LOW

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)

2026-01-05 cna@vuldb.com

PHP SQLi Online Product Reservation System Fabian

2.1

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

2.1 LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

6.3 (MEDIUM) 2.1 (LOW)

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 09, 2026 - 14:59 vuln.today

Public exploit code

CVE Published

Jan 05, 2026 - 14:15 nvd

MEDIUM 6.3

DescriptionCVE.org

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 possible to launch the attack remotely. The exploit is publicly available and might be used.

AnalysisAI

SQL injection in the cart update handler of Online Product Reservation System 1.0 allows authenticated attackers to manipulate product ID and quantity parameters, potentially leading to unauthorized data access, modification, or deletion. Public exploit code exists for this vulnerability, and no patch is currently available, affecting systems running the vulnerable PHP application.

Technical ContextAI

Affects Online Product Reservation System. 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 possible to launch the attack remotely. The exploit is publicly available and might be used.

RemediationAI

Monitor vendor advisories for a patch. Use parameterized queries. Implement input validation. Restrict network access to the affected service where possible.