UpHeron
All vulnerabilities

Servers and applications

CVE-2026-42055

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_proxy_v2_module and ngx_http_grpc_module modules. This vulnerability exists when the proxy_http_version to 2 or grpc_pass directives are used to proxy HTTP/2 traffic, the ignore_invalid_headers directive is set to off, and the large_client_header_buffers directive size is larger than 2 megabytes. A remote, unauthenticated…

Severity
Critical 9.2
Published
17 Jun 2026
Last changed
14 Sept 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
nginxServers and applications · cpe:a:f5:nginx_open_source
  • From 1.0.0 up to 1.30.2
  • From 1.31.0 up to 1.31.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-42055
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-42055