Which versions of PHP are affected by CVE-2026-3709?

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…

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.

PHP CVE-2026-3709

Q: 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/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%.

MEDIUM

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

2026-03-08 cna@vuldb.com

PHP SQLi

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

Severity Changed

Apr 29, 2026 - 01:11 NVD

HIGH MEDIUM

CVSS changed

Apr 29, 2026 - 01:11 NVD

7.3 (HIGH) 5.5 (MEDIUM)

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

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.

AnalysisAI

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

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Risk assessment & exploitation conditions
Attack chain visualization
Remediation with exact patch versions
Threat intelligence from 22 sources
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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

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 AssessmentAI

Exploitation	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. Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	CVSS 7.3 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	A remote attacker could exploit this vulnerability to sql injection.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

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. …

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

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CVE-2026-3709 vulnerability details – vuln.today

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PHP CVE-2026-3709

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Attack ChainAIDerived

Vulnerability AssessmentAI

Recommended ActionAI

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External POC / Exploit Code