GHSA-2q33-cf8w-7q23: Duplicate Advisory Remote Code Execution Vulnerability

CRITICAL
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CVSS 9.8
CWE-416
Published
Advisory Summary

GHSA-2q33-cf8w-7q23 is a CRITICAL (CVSS 9.8) remote code execution vulnerability (CWE-416: Use After Free) affecting Duplicate Advisory libraries in the NuGet ecosystem. The issue involves microsoft quic remote code execution vulnerability. Remediation is available in the latest vendor maintenance releases.

GHSA-2q33-cf8w-7q23 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-2q33-cf8w-7q23
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-416: Use After Free
Affected Product Duplicate Advisory
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix GHSA-2q33-cf8w-7q23

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Microsoft.Native.Quic.MsQuic.OpenSSL fixed: Latest secure release 
Upgrade Microsoft.Native.Quic.MsQuic.OpenSSL to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for Microsoft.Native.Quic.MsQuic.OpenSSL

How to Check if You Are Affected

To determine whether your application is affected by GHSA-2q33-cf8w-7q23, inspect your project dependencies for Duplicate Advisory:

inspect dependencies for Microsoft.Native.Quic.MsQuic.OpenSSL

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-416: Use After Free, where the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-92f5-vc22-8j33. This link is maintained to preserve external references. ## Original Description Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

GHSA-2q33-cf8w-7q23 Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
Microsoft.Native.Quic.MsQuic.OpenSSL
nuget/Microsoft.Native.Quic.MsQuic.OpenSSL
NuGet

References

NVD — GHSA-2q33-cf8w-7q23 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-62815
msrc.microsoft.com/update-guide/vulner... WEB
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62815

Frequently Asked Questions

What is GHSA-2q33-cf8w-7q23?
GHSA-2q33-cf8w-7q23 is a security vulnerability in Duplicate Advisory involving Microsoft QUIC Remote Code Execution Vulnerability under CWE-416: Use After Free.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: Microsoft.Native.Quic.MsQuic.OpenSSL.
What version fixes GHSA-2q33-cf8w-7q23?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is Microsoft.Native.Quic.MsQuic.OpenSSL affected?
Yes, Microsoft.Native.Quic.MsQuic.OpenSSL is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-2q33-cf8w-7q23?
GHSA-2q33-cf8w-7q23 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with GHSA-2q33-cf8w-7q23?
GHSA-2q33-cf8w-7q23 is classified under CWE-416: Use After Free (The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.).
How can I check NuGet dependencies for GHSA-2q33-cf8w-7q23?
Run the dependency tree command: 'inspect dependencies for Microsoft.Native.Quic.MsQuic.OpenSSL'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2q33-cf8w-7q23",
  "modified" : "2026-09-08T20:26:47Z",
  "published" : "2026-08-11T18:31:26Z",
  "withdrawn" : "2026-09-08T20:26:47Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Microsoft QUIC Remote Code Execution Vulnerability",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-92f5-vc22-8j33. This link is maintained to preserve external references.\n\n## Original Description\n\nUse after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Microsoft.Native.Quic.MsQuic.OpenSSL"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 2.4.19"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-62815"
  }, {
    "type" : "WEB",
    "url" : "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62815"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-416" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-08T20:26:47Z",
    "nvd_published_at" : "2026-08-11T17:18:35Z"
  }
}