CVE-2026-28761 Overview
CVE-2026-28761 is a Cross-Site Request Forgery (CSRF) vulnerability in Musetheque V4 Information Disclosure for IPKNOWLEDGE V4L1 rev2203.0 and earlier. The flaw allows an attacker to trigger unintended state-changing operations against the affected product when an authenticated user views a malicious page. The weakness is tracked under CWE-352: Cross-Site Request Forgery.
Exploitation requires an active user session and user interaction with attacker-controlled content. No authentication or privileges are required from the attacker, and the attack vector is network-based.
Critical Impact
An authenticated user visiting a malicious page can be coerced into executing unauthorized operations on Musetheque V4, leading to information disclosure and integrity impact within the application.
Affected Products
- Musetheque V4 Information Disclosure for IPKNOWLEDGE V4L1 rev2203.0
- Musetheque V4 Information Disclosure for IPKNOWLEDGE V4L1 earlier than rev2203.0
Discovery Timeline
- 2026-05-15 - CVE-2026-28761 published to NVD
- 2026-05-15 - Last updated in NVD database
Technical Details for CVE-2026-28761
Vulnerability Analysis
The vulnerability stems from missing or insufficient CSRF protection in Musetheque V4 Information Disclosure for IPKNOWLEDGE V4L1. State-changing HTTP requests issued by the application do not require an unpredictable, request-bound token tied to the user session. An attacker who controls or influences a web page visited by an authenticated user can cause the user's browser to issue forged requests to the application. The browser automatically attaches session cookies, allowing the forged requests to execute with the victim's privileges.
Because the affected product handles information disclosure functions, forged operations can manipulate data access or expose sensitive records. The advisory does not specify the precise endpoints affected, but the impact applies to operations reachable while the user is logged in.
Root Cause
The root cause is the absence of robust anti-CSRF controls on authenticated, state-changing requests. Reliance on ambient session cookies without per-request tokens, SameSite cookie attributes, or origin validation allows cross-origin requests to be accepted as legitimate.
Attack Vector
The attacker hosts a malicious page containing auto-submitting forms or scripted requests targeting the Musetheque V4 application. When a logged-in user loads the page, the browser issues the forged request with the user's session cookies. The server processes the request as authentic and performs the requested operation. No attacker authentication is required, but the victim must be authenticated and must interact with attacker content.
Verified exploit code is not publicly available. See the JVN Vulnerability Report for vendor-published technical details.
Detection Methods for CVE-2026-28761
Indicators of Compromise
- HTTP requests to Musetheque V4 endpoints with Origin or Referer headers pointing to untrusted external domains.
- Authenticated state-changing requests missing a valid anti-CSRF token parameter or header.
- Unexpected information disclosure actions performed by user accounts during normal browsing sessions.
Detection Strategies
- Inspect web server and application logs for POST or state-changing GET requests with mismatched Origin and Host headers.
- Correlate user session activity with browser referrer data to identify requests originating from external pages.
- Alert on bursts of identical authenticated requests from multiple user sessions, which can indicate broad CSRF campaigns.
Monitoring Recommendations
- Enable verbose access logging on Musetheque V4 endpoints and forward logs to a centralized analytics platform.
- Track authentication events and follow-on actions to detect operations that do not match typical user workflows.
- Monitor outbound proxy logs for user visits to newly registered or low-reputation domains preceding suspicious application activity.
How to Mitigate CVE-2026-28761
Immediate Actions Required
- Apply vendor updates released after rev2203.0 once available; consult the JVN Vulnerability Report for the latest guidance.
- Restrict access to Musetheque V4 to trusted networks or VPN-only access until patched.
- Instruct users to log out of the application when not in use and to avoid browsing untrusted sites in the same browser session.
Patch Information
The vendor advisory is published through JVN under reference JVN69128376. Administrators should consult the advisory for fixed revisions and upgrade instructions for IPKNOWLEDGE V4L1.
Workarounds
- Configure session cookies with the SameSite=Strict or SameSite=Lax attribute to block cross-site request inclusion.
- Deploy a web application firewall rule that rejects state-changing requests with missing or untrusted Origin and Referer headers.
- Require users to access Musetheque V4 from a dedicated browser profile that is not used for general web browsing.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
