What is CVE-2026-57100?

CVE-2026-57100 is a critical-severity vulnerability in Microsoft Entra Provisioning Service, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.9/10. Published 2026-07-02.

How severe is CVE-2026-57100?

Critical severity. CVSS v3 base score is 9.9 out of 10.

SSRF in Microsoft Entra Provisioning Service

CVE-2026-57100

Server-side request forgery (ssrf) in Microsoft Entra Provisioning Service (SyncFabric) allows an authorized attacker to elevate privileges over a network.

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Microsoft Entra Provisioning Service

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-57100?: CVE-2026-57100 is a critical-severity vulnerability in Microsoft Entra Provisioning Service, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.9/10. Published 2026-07-02.
How severe is CVE-2026-57100?: Critical severity. CVSS v3 base score is 9.9 out of 10.