What is CVE-2026-26139?

CVE-2026-26139 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-2026-26139?

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

SSRF in Microsoft Purview

CVE-2026-26139

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)

Published 2026-03-19 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.010 (62.6th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.010 · change: +0.005

Affected products

Weakness classification (CWE)

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

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26139 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-26139?: CVE-2026-26139 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-2026-26139?: High severity. CVSS v3 base score is 8.6 out of 10.