PT-2026-6052 · F5+5 · F5 Big-Ip+7
Jan Schaumann
·
Published
2026-01-01
·
Updated
2026-06-03
·
CVE-2026-1642
CVSS v4.0
8.2
High
| Vector | 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 |
Name of the Vulnerable Software and Affected Versions
NGINX OSS and NGINX Plus (affected versions not specified)
F5 BIG-IP (affected versions not specified)
Description
A flaw exists in NGINX OSS and NGINX Plus when used to proxy to upstream Transport Layer Security (TLS) servers. An attacker positioned in a man-in-the-middle (MITM) configuration on the upstream server side, alongside specific conditions outside of the attacker’s control, may be able to inject plain text data into the response from a proxied upstream server. F5 has identified vulnerabilities in BIG-IP, NGINX, and container services that create denial-of-service risks, particularly in high-traffic environments like web application firewalls and Kubernetes ingress. These vulnerabilities could allow attackers to overwhelm services remotely, causing disruptions to service availability. One specific vulnerability, CVE-2026-1642, allows for network-adjacent denial-of-service attacks through crafted requests.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
DoS
Insufficient Verification of Data Authenticity
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Related Identifiers
Affected Products
F5 Big-Ip
Linuxmint
Nginx Oss
Nginx Plus
Nginx
Red Os
Rocky Linux
Ubuntu