CVE-2025-68492
Authorization Bypass in Chainlit Threads Allows Unauthorized Access
Publication date: 2026-01-14
Last updated on: 2026-01-14
Assigner: JPCERT/CC
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| chainlit | chainlit | to 2.8.5 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-639 | The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an authorization bypass in Chainlit versions prior to 2.8.5. It occurs through a user-controlled key, allowing an attacker who can log in to the product to improperly view threads or obtain thread ownership without proper authorization checks. [1, 2]
How can this vulnerability impact me? :
If exploited, this vulnerability allows an attacker with login credentials to view threads they should not have access to or take ownership of threads improperly. This can lead to unauthorized access to information and potential misuse of thread ownership, though the overall impact is considered low to medium severity. [1]
What immediate steps should I take to mitigate this vulnerability?
The immediate step to mitigate this vulnerability is to update Chainlit to version 2.8.5 or later, which includes the fix for the authorization bypass issue by adding the missing authorization check. [1, 2]