All vulnerabilities

Servers and applications

CVE-2026-1642

A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers. An attacker with a man-in-the-middle (MITM) position on the upstream server side—along with conditions beyond the attacker's control—may be able to inject plain text data into the response from an upstream proxied server.  Note: Software versions which have reached End…

Severity
High 8.2
Published
4 Feb 2026
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
1.28.2, 1.29.5
Sources
NVD

Affected software

SoftwareAffected versions
nginxServers and applications · cpe:a:f5:nginx_open_source
  • From 1.3.0 before 1.28.2
  • From 1.29.0 before 1.29.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-1642
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-1642