What is the CVSS score of CVE-2026-3709?

CVE-2026-3709 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. EPSS exploitation probability: 0.0%.

Is there a public PoC exploit available for CVE-2026-3709?

Yes, a public proof-of-concept exploit is available for CVE-2026-3709. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-3709?

Within 24 hours: Identify and inventory all systems running Simple Flight Ticket Booking System versions up to 1.0; isolate affected systems from direct internet access if possible; enable enhanced logging and monitoring for SQL injection attack patterns. Within 7 days: Deploy Web Application Firewall (WAF) rules to block common SQL injection payloads; restrict database account privileges to minimum necessary permissions; conduct vulnerability scanning to identify exploitation attempts. Within 30 days: Contact vendor for patch availability timeline; evaluate alternative booking systems if patch is not forthcoming; conduct security assessment and penetration testing post-remediation.

Simple Flight Ticket Booking System CVE-2026-3709

MEDIUM

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

2026-03-08 cna@vuldb.com

PHP SQLi Simple Flight Ticket Booking System Carmelo

5.5

CVSS 4.0 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Send crafted HTTP request to /register.php
Exploit

Inject SQL payload in Username parameter
Execution

Bypass authentication or extract database contents
Impact

Access sensitive flight booking data

Vulnerability Assessment

Weakness	CWE CWE-74 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Input neutralization, injection prevention
Exploitation Conditions	No special conditions — remote unauthenticated exploitation against Simple Flight Ticket Booking System 1.0 with default configurations accepting user input in /register.php Username parameter without sanitization.
Impact	CVSS 7.3 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitable via remote/network. Public exploit/POC available.
Exploit ScenarioDerived	A remote attacker could exploit this vulnerability to sql injection.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Simple Flight Ticket Booking System versions up to 1.0 contains a vulnerability that allows attackers to sql injection (CVSS 7.3).

RemediationAI

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

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

affects Simple Flight Ticket Booking System. A weakness has been identified in code-projects Simple Flight Ticket Booking System 1.0. This affects an unknown function of the file /register.php. Executing a manipulation of the argument Username can lead to sql injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

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Exploit and PoC references, threat intelligence from 22 sources

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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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

Low

Vulnerable system: Integrity

Low

Vulnerable system: Availability

Low

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

HIGH MEDIUM

CVSS changed

Apr 29, 2026 - 01:11 NVD

7.3 (HIGH) 5.5 (MEDIUM)

PoC Detected

Mar 09, 2026 - 16:18 vuln.today

Public exploit code

CVE Published

Mar 08, 2026 - 06:16 nvd

HIGH 7.3

DescriptionCVE.org

A weakness has been identified in code-projects Simple Flight Ticket Booking System 1.0. This affects an unknown function of the file /register.php. Executing a manipulation of the argument Username can lead to sql injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

Executive ViewAI

Why It Matters

A high-severity SQL injection vulnerability (CVE-2026-3709) affects the Simple Flight Ticket Booking System up to version 1.0, allowing attackers to potentially extract or manipulate sensitive booking and customer data. With a public exploit available and no patch currently available, immediate mitigation is required to protect customer information and maintain service integrity.

Business Impact: High

Compensating Controls

Implement Web Application Firewall (WAF) with SQL injection detection and prevention rules; restrict database user accounts to least-privilege permissions; disable dynamic SQL query construction where possible; implement input validation and parameterized queries at application layer; segment the booking system network from other critical infrastructure; enable comprehensive database activity monitoring and alerting; consider disabling the booking feature until patch is available if risk tolerance is low.

Threat Intelligence Overview

EPSS Score

0.0%

Top 91% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.