CVE-2026-62899
MEDIUMCVSS 5.9/10
Last modified
CVE-2026-62899 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network..
Description
Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 10.0 | >= 10.0.0, < 10.0.11 |
| Microsoft | .NET 8.0 | >= 8.0.0, < 8.0.30 |
| Microsoft | .NET 9.0 | >= 9.0.0, < 9.0.19 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | >= 17.14.0, < 17.14.38 |
| Microsoft | Microsoft Visual Studio 2026 version 18.8 | >= 18.0, < 18.8.3 |
References
Timeline
- Published
- Last Modified
- Status
- Undergoing Analysis
Frequently Asked Questions
What is CVE-2026-62899?
Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network.
How severe is CVE-2026-62899?
CVE-2026-62899 has a CVSS score of 5.9/10 (MEDIUM severity).
How do I fix CVE-2026-62899?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-62899?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST