{"id":"CVE-2026-26143","title":"Microsoft PowerShell Security Feature Bypass Vulnerability","summary":"Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-20"],"vendor":"Microsoft","product":"PowerShell 7.4","affected":["powershell_7.4 >= 7.4.0 < 7.4.14","powershell_7.5 >= 7.5.0 < 7.5.5"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-04-16T13:24:29.195623Z"},"published":"2026-04-14","updated":"2026-09-25","sourceUpdated":"2026-09-25T17:25:38.069Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-26143","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143","label":"Microsoft PowerShell Security Feature Bypass Vulnerability"}],"tags":["cve.org"],"epss":0.00466,"epssPercentile":0.37752,"ingestedAt":"2026-09-25T18:14:20.437Z","slug":"CVE-2026-26143","body":"## Overview\n\nImproper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.\n\n## Affected\n\n- `powershell_7.4 >= 7.4.0 < 7.4.14`\n- `powershell_7.5 >= 7.5.0 < 7.5.5`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}