CVE-2026-114150: ASP.NET Core Information Disclosure Vulnerability
CVE-2026-114150 is an information disclosure vulnerability in ASP.NET Core, rated Important by Microsoft, with a CVSS 3.1 base score of 5.9 (Medium). An attacker can exploit it remotely over the network, without any privileges and without user interaction. Microsoft has not reported exploitation in the wild and rates exploitation as less likely. Microsoft released the fix on 10 November 2026 in the November 2026 Patch Tuesday. It affects 4 products in 1 product family (Developer Tools).
Key facts
- CVE ID
- CVE-2026-114150
- Severity
- Medium CVSS 5.9
- Microsoft severity
- Important
- Impact
- Information Disclosure
- Exploited in the wild
- No
- Publicly disclosed
- No
- Exploitation likelihood
- Less Likely
- Weakness
- CWE-908
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- November 2026 Patch Tuesday
- Product families
- Developer Tools
CVSS score and vector
Microsoft scores CVE-2026-114150 at 5.9 (temporal 5.2) using CVSS 3.1. Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
| Metric | Value |
|---|---|
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality impact | High |
| Integrity impact | None |
| Availability impact | None |
| Exploit code maturity | Unproven |
| Remediation level | Official fix |
| Report confidence | Confirmed |
Description
Use of uninitialized resource in ASP.NET Core allows an unauthorized attacker to disclose information over a network.
Affected products (4)
Developer Tools
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| .NET 11.0 installed on Windows | Release Notes | Security Update | 11.0.0 | |
| .NET 11.0 installed on Linux | Release Notes | Security Update | 11.0.0 | |
| .NET 11.0 installed on Mac OS | Release Notes | Security Update | 11.0.0 | |
| Microsoft Visual Studio 2026 version 18.12 | Release Notes | Security Update | 18.12.0 |
NIST NVD data
- NVD status
- Awaiting Analysis
- NVD CVSS
- 5.9 (MEDIUM)
- NVD weakness
- CWE-908
- Published to NVD
- NVD last modified
References
Acknowledgments
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. | |
| 2.0 | Changes made to the security updates links and information. This is an informational change only. |