CVEvulnerability

CVE-2026-1642

8.2 HIGH Published 2026-02-04 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-02-04
Last modified
2026-06-17
Assigner
[email protected]
CVSS 4.0 ([email protected])
8.2 HIGH — 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
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Weaknesses
CWE-345, CWE-349

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 configurations

• f5 nginx gateway fabric (>= 1.2.0 <= 1.6.2) • f5 nginx gateway fabric (>= 2.0.0 < 2.4.1) • f5 nginx ingress controller (>= 3.4.0 <= 3.7.2) • f5 nginx ingress controller (>= 4.0.0 <= 4.0.1) • f5 nginx ingress controller (>= 5.0.0 < 5.3.3) • f5 nginx instance manager (>= 2.15.1 <= 2.21.0) • f5 nginx open source (>= 1.3.0 < 1.28.2) • f5 nginx open source (>= 1.29.0 < 1.29.5) • f5 nginx plus (>= r33 < r35) • f5 nginx plus r32 • f5 nginx plus r33 • f5 nginx plus r34 • f5 nginx plus r35 • f5 nginx plus r36

Related

Weakness · CWE (2)

  • CWE-345 Insufficient Verification of Data Authenticity weakness
  • CWE-349 Acceptance of Extraneous Untrusted Data With Trusted Data weakness

References