UpHeron
All vulnerabilities

Servers and applications

CVE-2026-42926

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version to 2, and also uses proxy_set_body, an attacker may be able to inject frame headers and payload bytes to the upstream peer.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Severity
Medium 6.3
Published
13 May 2026
Last changed
18 Jun 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
nginxServers and applications · cpe:a:f5:nginx_open_source
  • From 1.29.4 up to 1.30.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-42926
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-42926