CVE-2026-21218

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-21218
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21218.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-21218
Aliases
Downstream
Related
Published
2026-02-10T18:16:22.967Z
Modified
2026-04-10T05:38:24.031483Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

Improper handling of missing special element in .NET allows an unauthorized attacker to perform spoofing over a network.

References

Affected packages

Git / github.com/dotnet/core

Affected ranges

Type
GIT
Repo
https://github.com/dotnet/core
Events
Introduced
d78b3180414d35d6c7d136db753474e2ae2b33df
Fixed
2d76eea456bdaf1092f06b3431f08b2dcfd2d1d6
Introduced
e18becd6171b8eb0eb4ec7ea8a0280cacfcee36b
Fixed
2d76eea456bdaf1092f06b3431f08b2dcfd2d1d6
Introduced
0e06b3b745aaf3f2f96e5f163773d20f8c7f7f50
Fixed
2d76eea456bdaf1092f06b3431f08b2dcfd2d1d6
Database specific 
{
    "versions": [
        {
            "introduced": "8.0.0"
        },
        {
            "fixed": "8.0.24"
        },
        {
            "introduced": "9.0.0"
        },
        {
            "fixed": "9.0.13"
        },
        {
            "introduced": "10.0.0"
        },
        {
            "fixed": "10.0.3"
        }
    ]
}

Affected versions

v10.*
v10.0.0
v10.0.1
v10.0.2
v8.*
v8.0.22
v8.0.23
v9.*
v9.0.11
v9.0.12

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21218.json"