Back to CVE records
Medium 5.9Published Aug 11, 2026
CVE-2026-62899.NET Security Feature Bypass Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft .NET 10.0 and 7 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Start free and add your stack
Free account, 1 product
Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network.
- CVSS
- 5.9 MEDIUM (v3.1, CNA)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
- Weakness (CWE)
- CWE-444
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft .NET 10.0 microsoft:net_10.0 (from the name) | from 10.0.0 before 10.0.11 | CNA record |
Microsoft .NET 8.0 microsoft:net_8.0 (from the name) | from 8.0.0 before 8.0.30 | CNA record |
Microsoft .NET 9.0 microsoft:net_9.0 (from the name) | from 9.0.0 before 9.0.19 | CNA record |
Microsoft Microsoft Visual Studio 2022 version 17.14 microsoft:visual_studio_2022_version_17.14 (from the name) | from 17.14.0 before 17.14.38 | CNA record |
Microsoft Microsoft Visual Studio 2026 version 18.8 microsoft:visual_studio_2026_version_18.8 (from the name) | from 18.0 before 18.8.3 | CNA record |
microsoft visual_studio_2022 microsoft:visual_studio_2022 | from 17.14.0 before 17.14.38 | NVD |
microsoft visual_studio_2026 microsoft:visual_studio_2026 | from 18.8.0 before 18.8.3 | NVD |
microsoft .net microsoft:.net | from 8.0.0 before 8.0.30; from 9.0.0 before 9.0.19; from 10.0.0 before 10.0.11 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62899vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.