CVE-2026-1117 is a vulnerability classified under CWE-284 (Improper Access Control) affecting the parisneo/lollms product, particularly version 5.9.0 and potentially others unspecified. The issue resides in the lollms_generation_events.py module, where the add_events function registers several Socket.IO event handlers such as generate_text, cancel_generation, generate_msg, and generate_msg_from without enforcing any authentication or authorization. This design flaw allows any unauthenticated client connected to the Socket.IO server to invoke these events, which can trigger resource-intensive operations or alter the server's internal state. The vulnerability is worsened by the use of global flags (lollmsElfServer.busy, lollmsElfServer.cancel_gen) for managing server state in a multi-client environment. These global flags are shared across all clients, meaning one client's actions can interfere with others, leading to race conditions and state corruption. The lack of proper access control and insecure state management can cause denial of service by exhausting server resources or corrupting operational state, impacting service availability and integrity. The CVSS v3.0 score is 8.2 (high), reflecting the network attack vector, no required privileges or user interaction, and significant impact on integrity and availability, though confidentiality is not affected. No patches or known exploits are currently documented, but the vulnerability presents a serious risk if exploited.

For European organizations, the primary impact of CVE-2026-1117 is on service availability and integrity. Organizations relying on parisneo/lollms for critical operations could face denial of service conditions caused by resource exhaustion or corrupted server state, disrupting business continuity. The vulnerability allows unauthenticated attackers to manipulate server state, potentially affecting multiple clients simultaneously due to shared global state flags. This could lead to operational disruptions in collaborative environments or services dependent on lollms. While confidentiality is not directly compromised, the integrity loss and availability impact could affect trust in the service and lead to financial or reputational damage. Sectors such as technology companies, research institutions, or any entity using parisneo/lollms for AI or text generation services in Europe may be particularly vulnerable. The absence of authentication requirements lowers the barrier for exploitation, increasing risk. Additionally, the multi-client state corruption risk could complicate incident response and recovery efforts.

European organizations should implement immediate mitigations including: 1) Restricting network access to the Socket.IO server hosting parisneo/lollms to trusted clients only, using network segmentation and firewall rules. 2) Implementing authentication and authorization layers around the Socket.IO event handlers to ensure only authorized users can invoke sensitive events. 3) Avoiding or refactoring the use of global state flags for managing server state in multi-client environments; instead, use client-specific state management to prevent cross-client interference. 4) Monitoring server logs and network traffic for unusual or repeated invocation of generation or cancellation events that may indicate exploitation attempts. 5) Engaging with the vendor or community to obtain patches or updates addressing this vulnerability as soon as they become available. 6) Applying rate limiting on event invocations to reduce the risk of resource exhaustion. 7) Conducting thorough security reviews and penetration testing on Socket.IO implementations to identify similar access control weaknesses. These steps go beyond generic advice by focusing on architectural changes and network controls specific to the vulnerability.