CVE-2026-57205: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in microsoft simplechat
SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions. Prior to 0.241.203, the authenticated GET /api/user/info/<user_id> and GET /api/user/profile-image/<user_id> endpoints in application/single_app/route_backend_users.py accepted a caller-supplied user_id and read the matching Cosmos DB user-settings document without object-level authorization, allowing a low-privilege authenticated user to retrieve another user's email address, display name, and profile image. This issue is fixed in version 0.241.203.
AI Analysis
Technical Summary
Microsoft SimpleChat versions before 0.241.203 contain an information exposure vulnerability due to lack of object-level authorization checks on the GET /api/user/info/<user_id> and GET /api/user/profile-image/<user_id> endpoints. These endpoints accept a caller-supplied user_id and retrieve corresponding user data from Cosmos DB without verifying that the caller is authorized to access that user's information. This allows low-privilege authenticated users to obtain sensitive information such as email addresses, display names, and profile images of other users. The vulnerability is tracked as CVE-2026-57205 and is associated with CWE-200 (Exposure of Sensitive Information), CWE-639 (Authorization Bypass Through User-Controlled Key), and CWE-862 (Missing Authorization). The issue is resolved in SimpleChat version 0.241.203.
Potential Impact
An attacker with low-privilege authenticated access can retrieve sensitive personal information of other users, including email addresses, display names, and profile images. This exposure could lead to privacy violations and potentially facilitate social engineering attacks. There is no impact on data integrity or availability reported.
Mitigation Recommendations
Upgrade Microsoft SimpleChat to version 0.241.203 or later, where the vulnerability has been fixed by implementing proper object-level authorization checks on the affected API endpoints. Patch status is confirmed by the vendor's versioning information. No additional mitigation is indicated.
CVE-2026-57205: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in microsoft simplechat
Description
SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions. Prior to 0.241.203, the authenticated GET /api/user/info/<user_id> and GET /api/user/profile-image/<user_id> endpoints in application/single_app/route_backend_users.py accepted a caller-supplied user_id and read the matching Cosmos DB user-settings document without object-level authorization, allowing a low-privilege authenticated user to retrieve another user's email address, display name, and profile image. This issue is fixed in version 0.241.203.
CVSS v3.1
Score 4.3medium
Affected software
pkg:github/microsoft/simplechatRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Microsoft SimpleChat versions before 0.241.203 contain an information exposure vulnerability due to lack of object-level authorization checks on the GET /api/user/info/<user_id> and GET /api/user/profile-image/<user_id> endpoints. These endpoints accept a caller-supplied user_id and retrieve corresponding user data from Cosmos DB without verifying that the caller is authorized to access that user's information. This allows low-privilege authenticated users to obtain sensitive information such as email addresses, display names, and profile images of other users. The vulnerability is tracked as CVE-2026-57205 and is associated with CWE-200 (Exposure of Sensitive Information), CWE-639 (Authorization Bypass Through User-Controlled Key), and CWE-862 (Missing Authorization). The issue is resolved in SimpleChat version 0.241.203.
Potential Impact
An attacker with low-privilege authenticated access can retrieve sensitive personal information of other users, including email addresses, display names, and profile images. This exposure could lead to privacy violations and potentially facilitate social engineering attacks. There is no impact on data integrity or availability reported.
Mitigation Recommendations
Upgrade Microsoft SimpleChat to version 0.241.203 or later, where the vulnerability has been fixed by implementing proper object-level authorization checks on the affected API endpoints. Patch status is confirmed by the vendor's versioning information. No additional mitigation is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-24T02:00:46.801Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a58f9c068715ace434105de
Added to database: 07/16/2026, 15:33:20 UTC
Last enriched: 07/16/2026, 15:48:43 UTC
Last updated: 07/16/2026, 17:48:39 UTC
Views: 5
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