CVE-2026-40372

Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.

Score

CVSS 3.1 9.1 Critical

Status

Modified - secure@microsoft.com

Published

2026-04-21

Last modified

2026-10-26

Weaknesses

CWE-347

Affected products

• Asp.net Core (Microsoft)
• Visual Studio 2026 (Microsoft)
• Enterprise Linux (Redhat)
• Hummingbird (Redhat)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40372
• https://access.redhat.com/security/cve/CVE-2026-40372
• https://bugzilla.redhat.com/show_bug.cgi?id=2460224
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40372.json