CVE-2026-23796 Overview
CVE-2026-23796 is a session fixation vulnerability in Quick.Cart, an e-commerce platform developed by OpenSolution. The vulnerability allows an attacker to set a user's session identifier before authentication, and the value of this session ID persists unchanged after the user logs in. This behavior enables an attacker to fix a session ID for a victim and later hijack the authenticated session, potentially gaining unauthorized access to the victim's account and sensitive data.
Critical Impact
Session fixation can lead to complete account takeover, allowing attackers to impersonate legitimate users, access sensitive customer data, and perform unauthorized transactions on the e-commerce platform.
Affected Products
- Quick.Cart version 6.7 (confirmed vulnerable)
- Other Quick.Cart versions (not tested, may also be vulnerable)
Discovery Timeline
- February 5, 2026 - CVE-2026-23796 published to NVD
- February 5, 2026 - Last updated in NVD database
Technical Details for CVE-2026-23796
Vulnerability Analysis
This vulnerability is classified as CWE-384 (Session Fixation), a well-documented authentication weakness. The core issue lies in how Quick.Cart manages session identifiers during the authentication lifecycle. When a user visits the application, a session ID is generated and assigned. The critical flaw is that this session identifier is not regenerated upon successful authentication—the same session token that existed before login continues to be used after the user authenticates.
In a typical session fixation attack scenario, an attacker can craft a malicious link containing a predetermined session ID or inject the session ID through other means such as cross-site scripting vectors. When an unsuspecting victim clicks this link and subsequently logs in, their authenticated session is bound to the session ID that the attacker already knows. The attacker can then use this known session ID to access the victim's authenticated session.
Root Cause
The root cause of this vulnerability is the failure to regenerate the session identifier upon successful user authentication. Secure session management requires that when a user transitions from an unauthenticated to an authenticated state, a new session ID must be generated to prevent any pre-authentication session fixation from being exploited.
Attack Vector
The attack requires local access with user interaction—specifically, the attacker must convince the victim to use a pre-set session identifier before logging in. This can be accomplished through:
- Sending the victim a crafted URL containing a fixed session ID parameter
- Using cross-site scripting or other injection techniques to set the session cookie in the victim's browser
- Exploiting any feature that allows session ID transmission via URL parameters
Once the victim authenticates using the fixed session, the attacker can immediately use that same session ID to access the authenticated session from their own browser, gaining full access to the victim's account and data within the Quick.Cart e-commerce platform.
Detection Methods for CVE-2026-23796
Indicators of Compromise
- Multiple authentication attempts or successful logins associated with the same session ID from different IP addresses or user agents
- Session IDs appearing in URL parameters or being passed through referrer headers
- Unusual patterns where session creation timestamps significantly precede authentication timestamps
Detection Strategies
- Implement logging that tracks session ID changes (or lack thereof) during authentication events
- Monitor for sessions being accessed from multiple geographic locations or distinctly different network sources
- Audit web server logs for session ID parameters being passed in URLs
- Deploy web application firewalls (WAF) with rules to detect session fixation patterns
Monitoring Recommendations
- Enable detailed authentication logging that captures session identifiers before and after login
- Set up alerts for sessions that show activity from multiple IP addresses within short timeframes
- Review access logs for patterns consistent with session hijacking, such as sudden user-agent changes mid-session
How to Mitigate CVE-2026-23796
Immediate Actions Required
- Upgrade Quick.Cart to the latest available version if a patch has been released
- Implement session regeneration at the application server or reverse proxy level if direct patching is not possible
- Review and harden session management configurations
- Consider implementing additional authentication controls such as IP binding or device fingerprinting
Patch Information
The vendor (OpenSolution) was notified about this vulnerability but did not respond with details about affected versions or patch availability. Users should monitor the OpenSolution Product Information page for updates. Additional technical details are available from the CERT Security Analysis CVE-2026-23796 advisory.
Workarounds
- Configure the application server or framework to regenerate session IDs upon authentication
- Disable session ID transmission via URL parameters and enforce cookie-only session handling
- Implement strict session timeout policies to limit the window of opportunity for session fixation attacks
- Add IP address or user-agent binding to sessions as an additional layer of protection
# Example Apache configuration to help mitigate session fixation
# Enable HttpOnly and Secure flags for session cookies
<IfModule mod_headers.c>
Header edit Set-Cookie ^(.*)$ $1;HttpOnly;Secure;SameSite=Strict
</IfModule>
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
