CVE-2026-62898

Microsoft QUIC Information Disclosure Vulnerability

Published Aug 11, 2026 CVSS 3.1 · 7.5 High EPSS 1.0% KEV · Not listed
Description
Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-c494-m2fq-59mx Microsoft Security Advisory CVE-2026-62898 – .NET Information Disclosure Vulnerability
History
Type Values Removed Values Added
First Time appeared Microsoft microsoft Visual Studio 2022
Microsoft microsoft Visual Studio 2026
Vendors & Products Microsoft microsoft Visual Studio 2022
Microsoft microsoft Visual Studio 2026
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
Title Microsoft QUIC Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft .net
Microsoft visual Studio 2022
Microsoft visual Studio 2026
Weaknesses CWE-416
CPEs cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft .net
Microsoft visual Studio 2022
Microsoft visual Studio 2026
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 10:01 PM
Reserved
Jul 14, 2026, 9:25 PM
Status
Analyzed
Published
Aug 11, 2026, 5:18 PM
Modified
Oct 28, 2026, 9:17 PM