CVE-2026-1642 — NGINX vulnerability

Description (CNA)

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 (CNA)

Vendor / product	Versions
F5 / NGINX Open Source	affected 1.3.0 before 1.29.5
F5 / NGINX Plus	affected R36 before R36 P2; affected R35 before R35 P1; affected R34 before ; affected R33 before ; affected R32 before R32 P4

CWE

CWE-349

References

https://my.f5.com/manage/s/article/K000159824

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/02/05/1