CVE-2026-86217: Hotel and Tourism Reservation Information Disclosure

CVE-2026-86217 is an information disclosure vulnerability in Hotel and Tourism Reservation PHP 1.0 affecting the Database Backup Handler. Attackers can remotely access sensitive data through exposed backup files. This article covers technical details, affected versions, security impact, and mitigation strategies.

CVE-2026-86217 Overview

CVE-2026-86217 is an information disclosure vulnerability in code-projects Hotel and Tourism Reservation in PHP 1.0. The flaw resides in the Database Backup Handler component, specifically involving the file /ht/hotel_db%20(1).sql. An unauthenticated remote attacker can retrieve the exposed SQL database backup file directly over HTTP, exposing sensitive application data. Public exploitation details are already available, increasing the likelihood of opportunistic scanning against exposed installations.

Critical Impact
An unauthenticated remote attacker can download a full SQL database backup, exposing reservation records, credentials, and other sensitive tables stored in the application database.

Affected Products

code-projects Hotel and Tourism Reservation in PHP 1.0
Deployments exposing the /ht/ directory and the hotel_db (1).sql backup file
Web servers hosting the application without directory access restrictions

Discovery Timeline

2026-09-06 - CVE-2026-86217 published to NVD
2026-09-08 - Last updated in NVD database

Technical Details for CVE-2026-86217

Vulnerability Analysis

The vulnerability is a sensitive information disclosure issue classified under [CWE-200]. The application ships or generates a SQL database backup file, hotel_db (1).sql, and stores it inside the web-accessible /ht/ directory. Because no authentication or access control protects this path, any remote client that requests the file over HTTP receives the full database dump.

SQL dumps typically contain schema definitions and all row data at the moment of export. For a reservation system, this includes guest records, booking history, administrator credentials, and any additional tables persisted by the application. Attackers who obtain the dump can pivot into credential reuse, account takeover, or targeted follow-on attacks against exposed users.

Root Cause

The root cause is an insecure deployment pattern in which a database backup artifact resides inside the document root without access controls. The web server serves the .sql file as static content, exposing internal application state to anonymous requests. There is no server-side check verifying that the requester is authenticated or authorized to access backup artifacts.

Attack Vector

Exploitation requires only network access to the web server hosting the application. An attacker issues a single HTTP GET request to the known path containing the SQL backup file. No authentication, user interaction, or elevated privileges are required. Because the URL is static and predictable, mass scanning tools can locate vulnerable instances at scale. Refer to the GitHub CVE Analysis and VulDB CVE-2026-86217 for the disclosed exploitation details.

Detection Methods for CVE-2026-86217

Indicators of Compromise

HTTP GET requests to /ht/hotel_db%20(1).sql or URL-decoded /ht/hotel_db (1).sql in web server access logs
Successful 200 OK responses returning large payloads with Content-Type: application/octet-stream or application/sql
Requests originating from unfamiliar IP ranges, scanner user agents, or automation frameworks
Repeated probing for common backup file extensions such as .sql, .bak, or .zip under the /ht/ path

Detection Strategies

Search web server and reverse proxy logs for any request path matching hotel_db or ending in .sql
Alert on anonymous downloads of files exceeding a size threshold from directories that should not serve static database artifacts
Perform authenticated vulnerability scans that specifically check for exposed backup files under application directories
Correlate outbound bandwidth spikes from the web host with sequential requests to backup file paths

Monitoring Recommendations

Enable centralized logging of full HTTP request URIs and response sizes for the web tier
Monitor for enumeration behavior targeting predictable backup filenames across all hosted PHP applications
Track filesystem changes that create or move .sql files into web-accessible directories

How to Mitigate CVE-2026-86217

Immediate Actions Required

Remove hotel_db (1).sql and any other database backup files from the /ht/ directory and from all web-accessible paths
Rotate database credentials, administrator passwords, and any API keys that may have been included in the exposed dump
Review web server logs for prior successful downloads of the backup file and treat any positive hit as a confirmed data breach
Notify affected users if guest or account data was exposed, in line with applicable disclosure obligations

Patch Information

No vendor patch is referenced in the CVE record. Because the flaw is a deployment and configuration issue rather than a code defect, remediation is performed by the operator. Consult the Code Projects Resource and VulDB Vulnerability #399355 for status updates.

Workarounds

Store database backups outside the web server document root, for example in /var/backups/ with restrictive filesystem permissions
Configure the web server to deny requests for .sql, .bak, .dump, and similar backup extensions
Restrict access to administrative directories using IP allowlists, authentication, or a VPN
Deploy a web application firewall rule blocking requests that target known backup file names

bash

# Apache example: block direct access to SQL and backup files
<FilesMatch "\.(sql|bak|dump|zip|tar|gz)$">
    Require all denied
</FilesMatch>

# Nginx example: return 404 for backup artifacts under /ht/
location ~* \.(sql|bak|dump)$ {
    deny all;
    return 404;
}

# Remove the exposed backup file from the web root
rm "/var/www/html/ht/hotel_db (1).sql"