CVE-2026-63161 in Agora Project
Summary
by MITRE • 10/15/2026
Omnispace Agora Project before 26.10.0 contains a session fixation vulnerability that allows remote attackers to hijack authenticated sessions by planting a known session identifier in a victim's browser prior to login. Attackers can exploit the application's failure to regenerate the session id upon successful authentication to gain unauthorized access to the victim's authenticated session after they log in.
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Analysis
by VulDB Data Team • 10/15/2026
The Omnispace Agora Project, specifically versions preceding 26.10.0, contains a critical security flaw classified as a session fixation vulnerability. This type of weakness stems from an improper implementation of state management within the web application framework, where the server fails to invalidate or regenerate the session identifier after a user successfully authenticates. In a secure system design, the transition from unauthenticated to authenticated states must trigger a complete reset of the session context to prevent any prior session data from persisting under the new identity. The absence of this mechanism allows an attacker to maintain control over the session token throughout the authentication process, effectively bridging the gap between pre-login and post-login states without detection by standard security controls.
The technical execution of this exploit relies on the application's failure to enforce strict session regeneration policies upon successful login credentials validation. An adversary can initiate a connection with the target web application and obtain a valid but unauthenticated session identifier, often referred to as a fixed session ID. This identifier is then delivered to the victim through various social engineering vectors or cross-site scripting attacks, such as embedding it in a malicious link that directs the user to the login page of the Omnispace Agora Project interface. When the victim enters their legitimate credentials and submits them for authentication, the server accepts these valid inputs but retains the session identifier previously set by the attacker rather than issuing a new one. Consequently, the authenticated session is bound to the ID known exclusively to the adversary.
This vulnerability results in severe operational impacts, primarily enabling unauthorized access to sensitive user accounts without requiring password guessing or credential theft. Once the victim logs in, their browser continues to use the fixed session identifier, which remains active and valid on the server side under the attacker's control. This allows the remote attacker to seamlessly hijack the authenticated session by simply sending requests with the pre-planted cookie value from a different machine or location. The implications are particularly severe for enterprise environments where Omnispace Agora Project is deployed, as it can lead to data exfiltration, privilege escalation if administrative accounts are targeted, and potential compromise of downstream systems that trust the compromised user session.
From a classification perspective, this flaw aligns with CWE-384, which defines Session Fixation as a vulnerability where an attacker sets or influences a session ID known to them before authentication occurs. It also maps directly to MITRE ATT&CK technique T1078, specifically Valid Accounts, and more precisely the sub-technique of hijacking valid sessions through fixation methods. The lack of proper session management violates fundamental principles outlined in OWASP guidelines regarding secure cookie handling and state transition integrity. Mitigation strategies must focus on enforcing strict server-side validation that mandates the generation of a new, cryptographically random session identifier immediately following successful authentication events. Additionally, implementing HttpOnly flags to prevent client-side script access to cookies, along with Secure attributes for transmission over encrypted channels, provides defense-in-depth measures against such hijacking attempts.