Medium 4.3Published Jul 16, 2026

CVE-2026-57205SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions.

Updated under an hour ago (2026-10-19 07:00 UTC)

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Exploited in the last 30 days

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: 4.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-200, CWE-639, CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Deferred
Record last updated: Jul 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

No affected products are listed yet.

References

https://github.com/microsoft/simplechat/blob/main/docs/explanation/fixes/USER_PROFILE_IDOR_AUTHORIZATION_FIX.md
https://github.com/microsoft/simplechat/releases/tag/v0.250.001
https://github.com/microsoft/simplechat/security/advisories/GHSA-x2jq-2m5m-65m4

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.