All vulnerabilities

Servers and applications

CVE-2020-1045

<p>A security feature bypass vulnerability exists in the way Microsoft ASP.NET Core parses encoded cookie names.</p> <p>The ASP.NET Core cookie parser decodes entire cookie strings which could allow a malicious attacker to set a second cookie with the name being percent encoded.</p> <p>The security update addresses the vulnerability by fixing the way the ASP.NET Core cookie parser handles…

Severity
High 7.5
Published
11 Sept 2020
Last changed
17 Jun 2026
Added to UpHeron
22 Oct 2026
Fixed in
3.1.8
Sources
NVD

Affected software

SoftwareAffected versions
.NETServers and applications · cpe:a:microsoft:asp.net_core
  • From 2.1 up to 2.1.21
  • From 3.1 before 3.1.8

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-1045
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-1045