Vulnerability · Published Aug 11, 2026 · Assigned by microsoft
CVE-2026-62898Microsoft QUIC Information Disclosure Vulnerability
High 7.5
In plain English
A high-severity use-after-free in Microsoft Visual Studio 2022 version 17.14 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.0%top 36.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | dotnet10-runtime | 10.0.13-r0 | ALPINE-CVE-2026-62898 |
| Alpine:v3.24 | dotnet10-runtime | 10.0.12-r0 | ALPINE-CVE-2026-62898 |
| Alpine:v3.22 | dotnet8-runtime | 8.0.31-r0 | ALPINE-CVE-2026-62898 |
| Alpine:v3.23 | dotnet8-runtime | 8.0.31-r0 | ALPINE-CVE-2026-62898 |
| Alpine:v3.24 | dotnet8-runtime | 8.0.31-r0 | ALPINE-CVE-2026-62898 |
| Alpine:v3.22 | dotnet9-runtime | 9.0.20-r0 | ALPINE-CVE-2026-62898 |
| Alpine:v3.23 | dotnet9-runtime | 9.0.20-r0 | ALPINE-CVE-2026-62898 |
| Alpine:v3.24 | dotnet9-runtime | 9.0.20-r0 | ALPINE-CVE-2026-62898 |
| NuGet | microsoft.netcore.app.runtime.win-arm64 | 8.0.30 | GHSA-c494-m2fq-59mx |
| NuGet | microsoft.netcore.app.runtime.win-arm64 | 9.0.19 | GHSA-c494-m2fq-59mx |
| NuGet | microsoft.netcore.app.runtime.win-arm64 | 10.0.11 | GHSA-c494-m2fq-59mx |
| NuGet | microsoft.netcore.app.runtime.win-x64 | 10.0.11 | GHSA-c494-m2fq-59mx |
| NuGet | microsoft.netcore.app.runtime.win-x64 | 8.0.30 | GHSA-c494-m2fq-59mx |
| NuGet | microsoft.netcore.app.runtime.win-x64 | 9.0.19 | GHSA-c494-m2fq-59mx |
| NuGet | microsoft.netcore.app.runtime.win-x86 | 8.0.30 | GHSA-c494-m2fq-59mx |
| NuGet | microsoft.netcore.app.runtime.win-x86 | 10.0.11 | GHSA-c494-m2fq-59mx |
| NuGet | microsoft.netcore.app.runtime.win-x86 | 9.0.19 | GHSA-c494-m2fq-59mx |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-62898 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 10.0 runtime | 10.0.0 – before 10.0.11 |
| Microsoft | .NET 8.0 runtime | 8.0.0 – before 8.0.30 |
| Microsoft | .NET 9.0 runtime | 9.0.0 – before 9.0.19 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – before 17.14.38 |
| Microsoft | Microsoft Visual Studio 2026 version 18.8 | 18.0 – before 18.8.3 |
Weakness: CWE-416 · 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
References
- Microsoft QUIC Information Disclosure Vulnerability vendor-advisory, patch