CVE-2026-56161: Azure Logic Apps Information Disclosure Vulnerability
CVE-2026-56161 is an information disclosure vulnerability in Azure Logic Apps, rated Critical by Microsoft, with a CVSS 3.1 base score of 9.6 (Critical). An attacker can exploit it remotely over the network, with low privileges and without user interaction. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.69% probability of exploitation activity in the next 30 days, higher than 53% of all scored vulnerabilities. Microsoft published it on 6 August 2026, outside Patch Tuesday. It affects 1 product in 1 product family (Azure).
Key facts
- CVE ID
- CVE-2026-56161
- Severity
- Critical CVSS 9.6
- Microsoft severity
- Critical
- Impact
- Information Disclosure
- Exploited in the wild
- No
- Publicly disclosed
- No
- Weakness
- CWE-284
- EPSS
- 0.69% (percentile 53%)
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- August 2026 Patch Tuesday
- Product families
- Azure
CVSS score and vector
Microsoft scores CVE-2026-56161 at 9.6 (temporal 8.3) using CVSS 3.1. 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
| Metric | Value |
|---|---|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Changed |
| Confidentiality impact | High |
| Integrity impact | High |
| Availability impact | None |
| Exploit code maturity | Unproven |
| Remediation level | Official fix |
| Report confidence | Confirmed |
Description
Improper access control in Azure Logic Apps allows an authorized attacker to disclose information over a network.
Frequently asked questions (Microsoft)
Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability?
This vulnerability has already been fully mitigated by Microsoft. There is no action for users of this service to take. The purpose of this CVE is to provide further transparency.
Please see Toward greater transparency: Unveiling Cloud Service CVEs for more information.
Affected products (1)
Azure
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| Azure Logic Apps |
NIST NVD data
- NVD status
- Analyzed
- NVD CVSS
- 9.6 (CRITICAL)
- NVD weakness
- CWE-284
- Published to NVD
- NVD last modified
Affected configurations (CPE)
| Product | Vulnerable versions |
|---|---|
| azure logic apps | all listed versions |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56161 (Vendor Advisory)
Acknowledgments
- Haakon Gulbrandsrud with Binary Security
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. |