8.7

CVE-2026-55723

NGINX Ingress Controller vulnerability

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 written into the generated NGINX configuration without sanitization. An authenticated attacker with permission to create or modify these CRDs or annotations may craft values that inject arbitrary NGINX configuration directives. 

Impact:
An authenticated attacker granted write access to NGINX Ingress Controller CRDs or Ingress annotations through the Kubernetes API may be able to inject arbitrary NGINX configuration directives, create or delete files, or disable services. There is no data plane exposure; this is a control plane issue only.

Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
F5 ≫ Nginx Ingress Controller Version >= 3.6.0 <= 3.7.2
F5 ≫ Nginx Ingress Controller Version >= 4.0.0 <= 4.0.1
F5 ≫ Nginx Ingress Controller Version >= 5.0.0 < 5.5.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.29% 0.212
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
F5 8.7 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/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
F5 8.3 2.8 5.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
CWE-76 Improper Neutralization of Equivalent Special Elements

The product correctly neutralizes certain special elements, but it improperly neutralizes equivalent special elements.

https://my.f5.com/manage/s/article/K000161800
Vendor Advisory
Mitigation