Which versions of PHP are affected by CVE-2026-5637?

CVE-2026-5637 is a critical SQL injection vulnerability in projectworlds Car Rental System 1.0 that allows unauthenticated attackers to execute arbitrary database commands through the administrative…

Is there a public PoC exploit available for CVE-2026-5637?

Yes, a public proof-of-concept exploit is available for CVE-2026-5637. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-5637?

Within 24 hours: Identify all instances of projectworlds Car Rental System 1.0 in production and development environments; isolate affected systems from public network access or disable the /message_admin.php endpoint via web application firewall rules. Within 7 days: Contact projectworlds vendor for patch availability timeline; if no patch is imminent, evaluate alternative car rental management systems or implement compensating controls. Within 30 days: Deploy patched version once available, or execute full replacement of the affected application.

PHP CVE-2026-5637

Q: What is the CVSS score of CVE-2026-5637?

CVE-2026-5637 has a CVSS 4.0 base score of 5.5 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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%.

EUVD-2026-19203 MEDIUM

SQL Injection (CWE-89)

2026-04-06 VulDB

GHSA-f92h-cvpr-77r6

SQLi PHP

5.5

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

CVSS changed

Apr 29, 2026 - 01:11 NVD

6.9 (MEDIUM) 5.5 (MEDIUM)

PoC Detected

Apr 07, 2026 - 13:20 vuln.today

Public exploit code

EUVD ID Assigned

Apr 06, 2026 - 09:00 euvd

EUVD-2026-19203

Analysis Generated

Apr 06, 2026 - 09:00 vuln.today

CVE Published

Apr 06, 2026 - 08:15 nvd

MEDIUM 6.9

DescriptionCVE.org

A security vulnerability has been detected in projectworlds Car Rental System 1.0. This vulnerability affects unknown code of the file /message_admin.php of the component Parameter Handler. Such manipulation of the argument Message leads to sql injection. The attack may be launched remotely. The exploit has been disclosed publicly and may be used.

AnalysisAI

SQL injection in projectworlds Car Rental System 1.0 allows unauthenticated remote attackers to execute arbitrary SQL commands via the Message parameter in /message_admin.php. Publicly available exploit code exists, significantly lowering the barrier to exploitation. …

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Risk assessment & exploitation conditions
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Vulnerability AssessmentAI

Risk Assessment	Real-world risk is HIGH. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An unauthenticated attacker identifies a Car Rental System 1.0 installation through internet scanning or reconnaissance. Using the publicly available exploit code from GitHub (https://github.com/eqiya17/collection-of-vulnerabilities/issues/13), the attacker crafts a malicious HTTP POST request to /message_admin.php with a SQL injection payload in the Message parameter, such as: Message=' UNION SELECT username,password,email FROM admin_users--. …
Remediation	No vendor-released patch identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify all instances of projectworlds Car Rental System 1.0 in production and development environments; isolate affected systems from public network access or disable the /message_admin.php endpoint via web application firewall rules. …

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-5637 vulnerability details – vuln.today

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PHP CVE-2026-5637

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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