{"id":"CVE-2026-50526","title":".NET Tampering Vulnerability","summary":"Improper link resolution before file access ('link following') in .NET allows an authorized attacker to perform tampering locally.","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-59","CWE-345"],"vendor":"Microsoft","product":".NET 10.0","affected":[".net_10.0 >= 10.0.0 < 10.0.10",".net_8.0 >= 8.0.0 < 8.0.29",".net_9.0 >= 9.0.0 < 9.0.18","visual_studio_2022_version_17.12 >= 17.12.0 < 17.12.22","visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.36","visual_studio_2026_version_18.7 >= 18.0 < 18.7.4"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-07-15T03:59:34.142603Z"},"published":"2026-07-14","updated":"2026-09-17","sourceUpdated":"2026-09-17T22:32:01.373Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-50526","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50526","label":".NET Tampering Vulnerability"},{"url":"https://github.com/dotnet/sdk/security/advisories/GHSA-55jh-fwmh-39m4"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50526"},{"url":"https://github.com/dotnet/announcements/issues/415"},{"url":"https://github.com/dotnet/sdk/issues/55274"},{"url":"https://github.com/advisories/GHSA-55jh-fwmh-39m4"}],"tags":["cve.org","ghsa","nuget"],"epss":0.00228,"epssPercentile":0.13767,"aliases":["GHSA-55jh-fwmh-39m4"],"ecosystem":"nuget","patched":["Microsoft.NET.Build.Containers 10.0.10","Microsoft.NET.Build.Containers 9.0.18","Microsoft.NET.Build.Containers 8.0.29"],"ingestedAt":"2026-07-21T16:51:41.793Z","slug":"CVE-2026-50526","body":"## Overview\n\nImproper link resolution before file access ('link following') in .NET allows an authorized attacker to perform tampering locally.\n\n## Affected\n\n- `.net_10.0 >= 10.0.0 < 10.0.10`\n- `.net_8.0 >= 8.0.0 < 8.0.29`\n- `.net_9.0 >= 9.0.0 < 9.0.18`\n- `visual_studio_2022_version_17.12 >= 17.12.0 < 17.12.22`\n- `visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.36`\n- `visual_studio_2026_version_18.7 >= 18.0 < 18.7.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-50526)\n\nAffected packages:\n\n- `Microsoft.NET.Build.Containers >= 10.0.0, <= 10.0.9`\n- `Microsoft.NET.Build.Containers >= 9.0.0, <= 9.0.17`\n- `Microsoft.NET.Build.Containers >= 8.0.0, <= 8.0.28`\n\nPatched in:\n\n- `Microsoft.NET.Build.Containers 10.0.10`\n- `Microsoft.NET.Build.Containers 9.0.18`\n- `Microsoft.NET.Build.Containers 8.0.29`\n\nSource: https://github.com/advisories/GHSA-55jh-fwmh-39m4","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}