What is CVE-2026-55723?

CVE-2026-55723 is a high-severity vulnerability in F5 Nginx Ingress Controller, classified under CWE-76. CVSS score: 8.3/10. Published 2026-07-15.

How severe is CVE-2026-55723?

High severity. CVSS v3 base score is 8.3 out of 10.

Vulnerability in F5 Nginx Ingress Controller

CVE-2026-55723

When NGINX Ingress Controller is configured with Custom Resource Definitions (CRDs) or Ingress annotations, an injection vulnerability exists in the configuration generator of NGINX Ingress Controller. Multiple user-controllable fields are…

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.

Affected products

F5 Nginx Ingress Controller — versions 5.0.0, 2026-lts-r1

Weakness classification (CWE)

CWE-76

References

f5sirt@f5.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-55723?: CVE-2026-55723 is a high-severity vulnerability in F5 Nginx Ingress Controller, classified under CWE-76. CVSS score: 8.3/10. Published 2026-07-15.
How severe is CVE-2026-55723?: High severity. CVSS v3 base score is 8.3 out of 10.