UpHeron
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Servers and applications

CVE-2022-21656

Envoy is an open source edge and service proxy, designed for cloud-native applications. The default_validator.cc implementation used to implement the default certificate validation routines has a "type confusion" bug when processing subjectAltNames. This processing allows, for example, an rfc822Name or uniformResourceIndicator to be authenticated as a domain name. This confusion allows for the…

Severity
Medium 5.9
Published
22 Feb 2022
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.20.2
Sources
NVD

Affected software

SoftwareAffected versions
EnvoyServers and applications · cpe:a:envoyproxy:envoy
  • Every version before 1.20.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2022-21656
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2022-21656