VulnerabilityPublished 8 Mar 2026Updated 10 Mar 2026

CVE-2026-3709: code-projects Simple Flight Ticket Booking System · SQL Injection

Affects code-projects Simple Flight Ticket Booking SystemSource CVE Database V5

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Public exploit available · CVSS 6.9 Medium.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 4.0 base score

6.9Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Base metrics

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

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 8 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
code-projectsSimple Flight Ticket Booking System	Affected =1.0	Fixed in–

AI-suggested

To mitigate CVE-2026-3709, organizations should immediately review and update the affected codebase to implement proper input validation and sanitization for the Username parameter in /register.php. The recommended approach is to use parameterized queries or prepared statements to eliminate SQL Injection risks. If direct code modification is not immediately possible, deploying a Web Application Firewall (WAF) with rules targeting SQL Injection patterns can provide temporary protection. Restrict database user permissions to the minimum necessary to limit the impact of any successful injection. Conduct thorough security testing, including static and dynamic analysis, to identify and remediate similar injection flaws elsewhere in the application. Monitor logs for suspicious query patterns or unusual database activity indicative of exploitation attempts. Additionally, organizations should consider isolating the booking system from critical internal networks to reduce lateral movement risk. Finally, maintain an incident response plan ready to address potential breaches stemming from this vulnerability.

Description

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.

Impact

The primary impact of this vulnerability is unauthorized access to or manipulation of the backend database of the affected flight booking system. Attackers could extract sensitive user information such as registration details, credentials, or booking data, leading to privacy breaches and potential identity theft. They may also alter or delete data, disrupting business operations and undermining data integrity. In worst-case scenarios, attackers could escalate their access within the system or pivot to other internal resources if the database is interconnected. For organizations relying on this booking system, this could result in financial loss, reputational damage, regulatory penalties, and operational downtime. Since the vulnerability requires no authentication and can be exploited remotely, it poses a significant risk especially if the system is exposed to the internet. The public availability of exploit code further increases the likelihood of exploitation attempts. However, the impact is somewhat limited by the niche nature of the affected software and the absence of known active exploitation campaigns.

Summary

CVE-2026-3709 identifies a SQL Injection vulnerability in the Simple Flight Ticket Booking System version 1.0 developed by code-projects. The vulnerability resides in the /register.php file, where the Username parameter is improperly sanitized, allowing an attacker to inject malicious SQL code. This injection flaw enables remote attackers to manipulate backend database queries without requiring authentication or user interaction, potentially leading to unauthorized data disclosure, data modification, or even complete compromise of the database. The vulnerability has been assigned a CVSS 4.0 base score of 6.9, reflecting medium severity due to its network attack vector, low complexity, and no privileges or user interaction required. Although no active exploitation has been reported, the availability of exploit code publicly increases the risk of future attacks. The affected product is a flight ticket booking system, which may be deployed by small to medium travel agencies or demo environments, limiting widespread impact but still posing a significant risk to those environments. The lack of a patch or official remediation increases urgency for organizations to implement compensating controls. The vulnerability highlights the importance of secure coding practices, particularly input validation and the use of parameterized queries to prevent SQL Injection attacks.

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What to do

Affected software

Description

AI analysisMachine-generated, updated 15 Mar 2026, 09:19 UTC

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