{ "document": { "acknowledgments": [ { "names": [ "Nan Wang(@eternalsakura13) and Ziling Chen" ] } ], "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-2026-88097 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability - HTML", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88097" }, { "category": "self", "summary": "CVE-2026-88097 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability - CSAF", "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-88097.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 Edge (Chromium-based) Elevation of Privilege Vulnerability", "tracking": { "current_release_date": "2026-10-26T07:00:00.000Z", "generator": { "date": "2026-11-03T01:26:25.734Z", "engine": { "name": "MSRC Generator", "version": "1.0" } }, "id": "msrc_CVE-2026-88097", "initial_release_date": "2026-09-18T07:00:00.000Z", "revision_history": [ { "date": "2026-09-18T07:00:00.000Z", "legacy_version": "1", "number": "1", "summary": "Information published." }, { "date": "2026-10-26T07:00:00.000Z", "legacy_version": "2", "number": "2", "summary": "Added Edge software to the Security Updates table. Customers that are running supported version of Edge are encouraged to update to the indicated version to be protected from this vulnerability." } ], "status": "final", "version": "2" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "<155.0.4283.45", "product": { "name": "Microsoft Edge (Chromium-based) <155.0.4283.45", "product_id": "1" } }, { "category": "product_version", "name": "155.0.4283.45", "product": { "name": "Microsoft Edge (Chromium-based) 155.0.4283.45", "product_id": "11655" } } ], "category": "product_name", "name": "Microsoft Edge (Chromium-based)" } ], "category": "vendor", "name": "Microsoft" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-88097", "cwe": { "id": "CWE-416", "name": "Use After Free" }, "notes": [ { "category": "general", "text": "Microsoft", "title": "Assigning CNA" }, { "category": "faq", "text": "For an attacker to exploit this vulnerability, they would need to have knowledge of a specific operation that triggers a memory allocation failure, specifically a use after free.", "title": "According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?" }, { "category": "faq", "text": "An attacker could use this vulnerability to elevate privileges from a Low Integrity Level in a contained ("sandboxed") execution environment to a Medium Integrity Level. Please refer to AppContainer isolation and Mandatory Integrity Control for more information.", "title": "What privileges could be gained by an attacker who successfully exploited the vulnerability?" }, { "category": "faq", "text": "This vulnerability could lead to a browser sandbox escape.", "title": "According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?" }, { "category": "faq", "text": "Yes. Customers should apply all updates offered for the software installed on their systems.", "title": "There are multiple update packages available for some of the affected software. Do I need to install all the updates listed in the Security Updates table for the software?" } ], "product_status": { "fixed": [ "11655" ], "known_affected": [ "1" ] }, "references": [ { "category": "self", "summary": "CVE-2026-88097 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability - HTML", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88097" }, { "category": "self", "summary": "CVE-2026-88097 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability - CSAF", "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-88097.json" } ], "remediations": [ { "category": "vendor_fix", "date": "2026-09-18T07:00:00.000Z", "details": "153.0.4234.46:Security Update:https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security", "product_ids": [ "1" ], "url": "https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security" }, { "category": "vendor_fix", "date": "2026-09-18T07:00:00.000Z", "details": "155.0.4283.45:Security Update:https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security", "product_ids": [ "1" ], "url": "https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security" } ], "scores": [ { "cvss_v3": { "attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "exploitCodeMaturity": "UNPROVEN", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "remediationLevel": "OFFICIAL_FIX", "reportConfidence": "CONFIRMED", "scope": "CHANGED", "temporalScore": 7.1, "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C", "version": "3.1" }, "products": [ "1" ] } ], "threats": [ { "category": "impact", "details": "Elevation of Privilege" }, { "category": "exploit_status", "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely" } ], "title": "Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability" } ] }