2.3

CVSS Score

4.0

-

CVSS Score

Basic Information

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CVE-2025-68492

CVE-2025-68492: Chainlit contains an authorization bypass vulnerability

Chainlit versions prior to 2.8.5 contain an authorization bypass through user-controlled key vulnerability. If this vulnerability is exploited, threads may be viewed or thread ownership may be obtained by an attacker who can log in to the product.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2025-68492

CVE-2025-68492:

2.3

CVSS Score

4.0

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
chainlit	pip	< 2.8.5	2.8.5

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability is an authorization bypass where a logged-in user can access another user's conversation threads. The root cause is a missing authorization check in the websocket connection logic. The patch is in commit 8f1153db439eca58ae5c50c8276ba6fdd311448e, which modifies backend/chainlit/socket.py.

The function connect in this file is the entry point for websocket connections. The patch introduces a new authorization check within this function. When a client provides a thread_id to resume a session, the updated code now fetches the thread's author via data_layer.get_thread_author(thread_id) and compares it against the authenticated user's identifier. If they do not match, the connection is terminated.

Prior to this fix, no such check existed, allowing any authenticated user to access any thread by its ID. Therefore, the connect function is the vulnerable function, as it was the point where the authorization was improperly handled. An exploit would involve a call to this function with a thread_id belonging to a different user.

Vulnerable functions

connect

backend/chainlit/socket.py

The `connect` function is responsible for handling new websocket connections. The vulnerability lies in the fact that before the patch, this function did not verify if the user attempting to connect to a specific thread (by providing a `thread_id`) was the actual owner of that thread. An attacker could provide a `thread_id` of a victim's thread and gain access. The patch adds a check to ensure the user's identifier matches the thread's author, thus preventing the authorization bypass.

Vulnerability Intelligence
Miggo AI

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WAF Protection Rules

WAF Rule

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Reasoning

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