CVE-2026-70183

high

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70183

https://github.com/dotnet/aspnetcore/security/advisories/GHSA-494h-xx7x-5frh

https://github.com/dotnet/aspnetcore/discussions/69796

https://github.com/dotnet/announcements/issues/460

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-99698

Details

Source: Mitre, NVD

Published: 2026-10-13

Updated: 2026-10-14

Risk Information

CVSS v2

Base Score: 7.1

Vector: CVSS2#AV:N/AC:H/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H