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CVE PROGRAM SOURCE RECORD8.2 High

CVE-2026-1642

NGINX vulnerability

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

F5 NGINX Open Source

Default version status: unknown

  • 1.3.0 to < 1.29.5affected

F5 NGINX Plus

Default version status: unknown

  • R36 to < R36 P2affected
  • R35 to < R35 P1affected
  • R34 to < *affected
  • R33 to < *affected
  • R32 to < R32 P4affected

References