What is CVE-2026-87701?

CVE-2026-87701 is a critical-severity vulnerability in Microsoft Azure Cosmos Db, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 9.6/10. Published 2026-09-17.

How severe is CVE-2026-87701?

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

Vulnerability in Microsoft Azure Cosmos Db

CVE-2026-87701

Improper neutralization of special elements in output used by a downstream component ('injection') in Azure Cosmos DB allows an authorized attacker to elevate privileges over a network.

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.

Affected products

Microsoft Azure Cosmos Db

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

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

Frequently asked questions

What is CVE-2026-87701?: CVE-2026-87701 is a critical-severity vulnerability in Microsoft Azure Cosmos Db, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 9.6/10. Published 2026-09-17.
How severe is CVE-2026-87701?: Critical severity. CVSS v3 base score is 9.6 out of 10.