PatchSiren cyber security CVE debrief
CVE-2026-57205 microsoft CVE debrief
The SimpleChat application, prior to version 0.241.203, contained a vulnerability that allowed a low-privilege authenticated user to retrieve another user's email address, display name, and profile image without proper authorization. This issue was addressed in version 0.241.203. The vulnerability was present in 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, which accepted a caller-supplied user_id and read the matching Cosmos DB user-settings document without object-level authorization.
- Vendor
- microsoft
- Product
- simplechat
- CVSS
- MEDIUM 4.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-16
- Original CVE updated
- 2026-07-16
- Advisory published
- 2026-07-16
- Advisory updated
- 2026-07-16
Who should care
Users of SimpleChat version prior to 0.241.203 should be aware of this vulnerability and take steps to update their installation. This includes reviewing and adjusting user permissions and access controls, as well as monitoring for suspicious activity on the affected endpoints.
Technical summary
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. This allowed a low-privilege authenticated user to retrieve another user's email address, display name, and profile image. The issue is fixed in version 0.241.203.
Defensive priority
Medium
Recommended defensive actions
- Update SimpleChat to version 0.241.203 or later
- Review and adjust user permissions and access controls
- Monitor for suspicious activity on the affected endpoints
- Review compensating controls for exposed systems while remediation is scheduled and verified
- Check relevant monitoring, detection, and logs for exposed assets that need extra review
- Track exceptions, retest remediated assets, and close the item only after evidence is documented
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
Evidence notes
The CVE record was published on 2026-07-16T16:19:14.050Z and was last modified on 2026-07-16T17:13:54.870Z. The NVD entry is currently Deferred. This information is based on the provided source corpus. Further verification is recommended to ensure accuracy.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-16T16:19:14.050Z and has not been modified since then. The NVD entry is currently Deferred.