CVE-2026-83711

Critical

Description

Authorization bypass through user-controlled key in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.

SeverityCritical

CVSS10.0

Exploit probability—

Product

Microsoft Azure Active Directory

PublishedSep 3, 2026

First seenSep 3, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Patches

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83711

Affected products

Product	Affected versions	Fixed in
microsoft azure_active_directory_b2c	No range specified	—

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