CVE-2026-26143 (GCVE-0-2026-26143)

Vulnerability from cvelistv5 – Published: 2026-04-14 16:57 – Updated: 2026-04-15 21:54
VLAI?
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 ?
7.8 (High)
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
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
Microsoft PowerShell 7.4 Affected: 7.4.0 , < 7.4.14 (custom)
Create a notification for this product.
    Microsoft PowerShell 7.5 Affected: 7.5.0 , < 7.5.5 (custom)
Create a notification for this product.
Date Public ?
2026-04-14 14:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "PowerShell 7.4",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "7.4.14",
              "status": "affected",
              "version": "7.4.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "PowerShell 7.5",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "7.5.5",
              "status": "affected",
              "version": "7.5.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:microsoft:powershell:*:-:*:*:*:*:*:*",
                  "versionEndExcluding": "7.5.5",
                  "versionStartIncluding": "7.5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:microsoft:powershell:*:-:*:*:*:*:*:*",
                  "versionEndExcluding": "7.4.14",
                  "versionStartIncluding": "7.4.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-04-14T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "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",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-15T21:54:49.579Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Microsoft PowerShell Security Feature Bypass Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143"
        }
      ],
      "title": "Microsoft PowerShell Security Feature Bypass Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-26143",
    "datePublished": "2026-04-14T16:57:53.686Z",
    "dateReserved": "2026-02-11T16:24:51.134Z",
    "dateUpdated": "2026-04-15T21:54:49.579Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-26143",
      "date": "2026-04-15",
      "epss": "0.00096",
      "percentile": "0.26497"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-26143\",\"sourceIdentifier\":\"secure@microsoft.com\",\"published\":\"2026-04-14T18:16:45.620\",\"lastModified\":\"2026-04-14T18:16:45.620\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"}]}],\"references\":[{\"url\":\"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143\",\"source\":\"secure@microsoft.com\"}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.