What is CVE-2026-57206?

CVE-2026-57206 is a high-severity vulnerability in Microsoft Simplechat, classified under Missing Authentication for Critical Function. CVSS score: 8.6/10. Published 2026-07-16.

How severe is CVE-2026-57206?

High severity. CVSS v3 base score is 8.6 out of 10.

Auth bypass in Microsoft Simplechat

CVE-2026-57206

SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions. Prior to 0.241.206, several plugin validation routes in application/single_app/plugin_validation_endpoint.py, includi…

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L.

Affected products

Microsoft Simplechat — versions < 0.241.206

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-57206?: CVE-2026-57206 is a high-severity vulnerability in Microsoft Simplechat, classified under Missing Authentication for Critical Function. CVSS score: 8.6/10. Published 2026-07-16.
How severe is CVE-2026-57206?: High severity. CVSS v3 base score is 8.6 out of 10.