CVE-2026-21532CWE-200

Azure Function Information Disclosure Vulnerability

High · published February 5, 2026

CVSS v3.1
8.2
EPSS
1%
Percentile
59.2
In the wild
Unconfirmed
What it is

⚡ There's a high-stakes information disclosure vulnerability lurking in Azure Functions! If exploited, it could spill sensitive info like a leaky faucet during a storm. 💧 Think of Azure Functions as a hotel where guests check in but have access to the entire building. This vulnerability allows unauthorized individuals to peek into rooms they shouldn't be in, accessing sensitive guest information that could lead to serious privacy concerns. An attacker could potentially exploit this vulnerability to extract sensitive information, compromising the confidentiality of the entire system. This could lead to unauthorized access to user data and affect the trustworthiness of applications relying on Azure Functions.

Put simply

Think of Azure Functions as a hotel where guests check in but have access to the entire building. This vulnerability allows unauthorized individuals to peek into rooms they shouldn't be in, accessing sensitive guest information that could lead to serious privacy concerns. This vulnerability arises from improper access controls in Azure Functions, which could allow unauthorized information disclosure to users without the correct permissions. Essentially, sensitive data can be accessed due to a flaw in the function's logic.

What to do

An attacker could potentially exploit this vulnerability to extract sensitive information, compromising the confidentiality of the entire system. This could lead to unauthorized access to user data and affect the trustworthiness of applications relying on Azure Functions. To mitigate this vulnerability, ensure that you update your Azure Functions configuration to enforce stricter access controls. Regularly audit your permissions and limit access to only those who absolutely need it. Always keep your Azure environment up to date with the latest patches. You've got this! With a few adjustments, your Azure environment will be fortress-like. 🛡️

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00899 · 59.2th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-02-05T22:13Z
EPSS history
Timeline
  • 05 FEB 22:13Z
    Azure Function Information Disclosure Vulnerability
    cvelistv5