vulnerability
Nginx: SSL upstream injection (CVE-2026-1642)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:N/I:C/A:N) | Feb 5, 2026 | Feb 5, 2026 | Mar 27, 2026 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:N/I:C/A:N)
Published
Feb 5, 2026
Added
Feb 5, 2026
Modified
Mar 27, 2026
Description
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.
Solutions
nginx-nginx-upgrade-1_28_2nginx-nginx-upgrade-1_29_5
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.