{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "\u003ca href=\"https://www.linkedin.com/in/alasdair-gorniak/\"\u003eAlasdair Gorniak\u003c/a\u003e with \u003ca href=\"https://delta.cyberm.ca/\"\u003eDelta Obscura\u003c/a\u003e"
        ]
      }
    ],
    "aggregate_severity": {
      "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      },
      {
        "category": "general",
        "text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
        "title": "Customer Action"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-26149 Microsoft Power Apps Security Feature Bypass - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26149"
      },
      {
        "category": "self",
        "summary": "CVE-2026-26149 Microsoft Power Apps Security Feature Bypass - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-26149.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Exploitability Index",
        "url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Microsoft Power Apps Security Feature Bypass",
    "tracking": {
      "current_release_date": "2026-04-14T07:00:00.000Z",
      "generator": {
        "date": "2026-04-14T16:56:51.673Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-26149",
      "initial_release_date": "2026-04-14T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-04-14T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c3.26032.10.0",
            "product": {
              "name": "Microsoft Power Apps \u003c3.26032.10.0",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "3.26032.10.0",
            "product": {
              "name": "Microsoft Power Apps 3.26032.10.0",
              "product_id": "12186"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Power Apps"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-26149",
      "cwe": {
        "id": "CWE-150",
        "name": "Improper Neutralization of Escape, Meta, or Control Sequences"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "A user must interact with a malicious Power Apps canvas app, such as by opening or using it.\nAdditionally, an attacker only needs basic capabilities to create or share a Power App; they do not need administrative access.",
          "title": "According to the CVSS metric, user interaction is required (UI:R) and privileges required are Low (PR:L). What does that mean for this vulnerability?"
        },
        {
          "category": "faq",
          "text": "This vulnerability could lead to the attacker gaining the ability to interact with other tenant\u2019s applications and content.",
          "title": "According to the CVSS metric, successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?"
        },
        {
          "category": "faq",
          "text": "The vulnerability could bypass the security warning dialog that is meant to clearly inform users when an app is attempting to open an external protocol. Because whitespace in the URI causes the dialog to truncate important information, users may not see the true destination or risk.",
          "title": "What kind of security feature could be bypassed by successfully exploiting this vulnerability?"
        },
        {
          "category": "faq",
          "text": "An attacker could create a malicious Power Apps canvas app that includes an external protocol link disguised with leading whitespace. When a user opens the app, the resulting warning dialog may appear incomplete or misleading. If the user proceeds, the app could trigger an external protocol call that performs unintended actions on the user\u2019s device.",
          "title": "How could an attacker exploit this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "12186"
        ],
        "known_affected": [
          "1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-26149 Microsoft Power Apps Security Feature Bypass - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26149"
        },
        {
          "category": "self",
          "summary": "CVE-2026-26149 Microsoft Power Apps Security Feature Bypass - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-26149.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-04-14T07:00:00.000Z",
          "details": "3.26032.10.0:Security Update:https://apps.microsoft.com/detail/9mvc8p1q3b29?hl=en-US\u0026gl=US",
          "product_ids": [
            "1"
          ],
          "url": "https://apps.microsoft.com/detail/9mvc8p1q3b29?hl=en-US\u0026gl=US"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.0,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "remediationLevel": "TEMPORARY_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "CHANGED",
            "temporalScore": 7.9,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:T/RC:C",
            "version": "3.1"
          },
          "products": [
            "1"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Security Feature Bypass"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Microsoft Power Apps Security Feature Bypass"
    }
  ]
}