What is CVE-2026-26135?

CVE-2026-26135 is a critical-severity vulnerability in Microsoft Azure Custom Locations Resource Provider, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.6/10. Published 2026-04-02.

How severe is CVE-2026-26135?

Critical severity. CVSS v3 base score is 9.6 out of 10.

SSRF in Microsoft Azure Custom Locations Resource Provider

CVE-2026-26135

Server-side request forgery (ssrf) in Azure Custom Locations Resource Provider (RP) allows an authorized attacker to elevate privileges over a network.

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.001 (17.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C.

Affected products

Microsoft Azure Custom Locations Resource Provider

Weakness classification (CWE)

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

References

Azure Custom Locations Resource Provider (RP) Elevation of Privilege Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-26135?: CVE-2026-26135 is a critical-severity vulnerability in Microsoft Azure Custom Locations Resource Provider, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.6/10. Published 2026-04-02.
How severe is CVE-2026-26135?: Critical severity. CVSS v3 base score is 9.6 out of 10.