CVE-2026-1642
EPSS 0.02%NGINX vulnerability
Published: 2/4/2026Modified: 5/18/2026
Also known as:ALPINE-CVE-2026-1642DEBIAN-CVE-2026-1642
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.
Affected packages (5)
- Alpine/nginxfrom 0, < 1.28.2-r0
- Bitnami/nginx>= 1.3.0, < 1.28.4, >= 1.29.4, < 1.29.5
- Bitnami/nginx-gateway>= 1.3.0, < 1.29.5
- Debian/nginxfrom 0, < 1.18.0-6.1+deb11u6
- Debian/nginxfrom 0, < 1.22.1-9+deb12u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |