What is CVE-2026-26138?

CVE-2026-26138 is a high-severity vulnerability in Microsoft Purview, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-03-19.

How severe is CVE-2026-26138?

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

SSRF in Microsoft Purview

CVE-2026-26138

Server-side request forgery (ssrf) in Microsoft Purview allows an unauthorized attacker to elevate privileges over a network.

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.001 (27.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Microsoft Purview

Weakness classification (CWE)

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

References

Microsoft Purview Elevation of Privilege Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-26138?: CVE-2026-26138 is a high-severity vulnerability in Microsoft Purview, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-03-19.
How severe is CVE-2026-26138?: High severity. CVSS v3 base score is 8.6 out of 10.