NGINX
CVE-2026-1642: NGINX vulnerability
A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| NGINX Open Source 1.3 | 1.28.2 or later |
| NGINX Plus R36 | R36 P2 or later |
| NGINX Plus R35 | R35 P1 or later |
| NGINX Plus R34 | * or later |
| NGINX Plus R33 | * or later |
| NGINX Plus R32 | R32 P4 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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 of Technical Support (EoTS) are not evaluated.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 12 Oct 2026.