# F5 NGINX Ingress Controller vulnerabilities

Source: https://junglewise.ai/threats/technologies/nginx-ingress-controller  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/nginx-ingress-controller.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 8 vulnerabilities in F5 NGINX Ingress Controller: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-55723, was published on 15 July 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 8 (0 critical, 0 exploited in the wild)

## About F5 NGINX Ingress Controller

An Ingress controller for Kubernetes that uses NGINX as a reverse proxy and load balancer.

## Latest F5 NGINX Ingress Controller vulnerabilities

- [CVE-2026-55723: F5 NGINX Ingress Controller configuration injection in CRDs and annotations](https://junglewise.ai/threats/cve-2026-55723-f5-nginx-ingress-controller-configuration-injection-in-crds-and) (high, CVSS 8.3, published 15 Jul 2026)
- [CVE-2026-52865: F5 NGINX Ingress Controller NULL pointer dereference in Ingress resources](https://junglewise.ai/threats/cve-2026-52865-f5-nginx-ingress-controller-null-pointer-dereference-in-ingress) (medium, CVSS 6.5, published 15 Jul 2026)
- [CVE-2026-42946: F5 NGINX memory over-read in SCGI and uWSGI modules](https://junglewise.ai/threats/cve-2026-42946-f5-nginx-memory-over-read-in-scgi-and-uwsgi-modules) (medium, CVSS 6.5, published 13 May 2026)
- [CVE-2026-42945: NGINX heap buffer overflow in ngx_http_rewrite_module](https://junglewise.ai/threats/cve-2026-42945-nginx-heap-buffer-overflow-in-ngx-http-rewrite-module) (high, CVSS 8.1, published 13 May 2026)
- [CVE-2026-42934: F5 NGINX heap buffer over-read in ngx_http_charset_module](https://junglewise.ai/threats/cve-2026-42934-f5-nginx-heap-buffer-over-read-in-ngx-http-charset-module) (medium, CVSS 4.8, published 13 May 2026)
- [CVE-2026-42926: F5 NGINX Open Source header injection in HTTP/2 proxying](https://junglewise.ai/threats/cve-2026-42926-f5-nginx-open-source-header-injection-in-http-2-proxying) (medium, CVSS 5.8, published 13 May 2026)
- [CVE-2026-40701: F5 NGINX heap-use-after-free in ngx_http_ssl_module](https://junglewise.ai/threats/cve-2026-40701-f5-nginx-heap-use-after-free-in-ngx-http-ssl-module) (medium, CVSS 4.8, published 13 May 2026)
- [CVE-2026-40460: F5 NGINX IP address spoofing in HTTP/3 QUIC module](https://junglewise.ai/threats/cve-2026-40460-f5-nginx-ip-address-spoofing-in-http-3-quic-module) (medium, CVSS 6.5, published 13 May 2026)

## Most severe F5 NGINX Ingress Controller vulnerabilities

- [CVE-2026-55723: F5 NGINX Ingress Controller configuration injection in CRDs and annotations](https://junglewise.ai/threats/cve-2026-55723-f5-nginx-ingress-controller-configuration-injection-in-crds-and) (high, CVSS 8.3, published 15 Jul 2026)
- [CVE-2026-42945: NGINX heap buffer overflow in ngx_http_rewrite_module](https://junglewise.ai/threats/cve-2026-42945-nginx-heap-buffer-overflow-in-ngx-http-rewrite-module) (high, CVSS 8.1, published 13 May 2026)
- [CVE-2026-42946: F5 NGINX memory over-read in SCGI and uWSGI modules](https://junglewise.ai/threats/cve-2026-42946-f5-nginx-memory-over-read-in-scgi-and-uwsgi-modules) (medium, CVSS 6.5, published 13 May 2026)
- [CVE-2026-40460: F5 NGINX IP address spoofing in HTTP/3 QUIC module](https://junglewise.ai/threats/cve-2026-40460-f5-nginx-ip-address-spoofing-in-http-3-quic-module) (medium, CVSS 6.5, published 13 May 2026)
- [CVE-2026-52865: F5 NGINX Ingress Controller NULL pointer dereference in Ingress resources](https://junglewise.ai/threats/cve-2026-52865-f5-nginx-ingress-controller-null-pointer-dereference-in-ingress) (medium, CVSS 6.5, published 15 Jul 2026)
- [CVE-2026-42926: F5 NGINX Open Source header injection in HTTP/2 proxying](https://junglewise.ai/threats/cve-2026-42926-f5-nginx-open-source-header-injection-in-http-2-proxying) (medium, CVSS 5.8, published 13 May 2026)
- [CVE-2026-42934: F5 NGINX heap buffer over-read in ngx_http_charset_module](https://junglewise.ai/threats/cve-2026-42934-f5-nginx-heap-buffer-over-read-in-ngx-http-charset-module) (medium, CVSS 4.8, published 13 May 2026)
- [CVE-2026-40701: F5 NGINX heap-use-after-free in ngx_http_ssl_module](https://junglewise.ai/threats/cve-2026-40701-f5-nginx-heap-use-after-free-in-ngx-http-ssl-module) (medium, CVSS 4.8, published 13 May 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other F5 technologies

- [F5 BIG-IP](https://junglewise.ai/threats/technologies/big-ip): 41 vulnerabilities
- [F5 BIG-IP Access Policy Manager](https://junglewise.ai/threats/technologies/big-ip-access-policy-manager): 30 vulnerabilities
- [F5 BIG-IP Advanced Firewall Manager](https://junglewise.ai/threats/technologies/big-ip-advanced-firewall-manager): 28 vulnerabilities
- [F5 BIG-IP Local Traffic Manager](https://junglewise.ai/threats/technologies/big-ip-local-traffic-manager): 27 vulnerabilities
- [F5 BIG-IP Advanced WAF](https://junglewise.ai/threats/technologies/big-ip-advanced-waf): 19 vulnerabilities
- [F5 NGINX Plus](https://junglewise.ai/threats/technologies/nginx-plus): 14 vulnerabilities
- [F5 Nginx-Gateway-Fabric](https://junglewise.ai/threats/technologies/nginx-gateway-fabric): 8 vulnerabilities
- [F5 BIG-IQ](https://junglewise.ai/threats/technologies/big-iq): 7 vulnerabilities
- [F5 BIG-IP DNS](https://junglewise.ai/threats/technologies/big-ip-dns): 6 vulnerabilities
- [F5 BIG-IQ Centralized Management](https://junglewise.ai/threats/technologies/big-iq-centralized-management): 4 vulnerabilities
- [F5 BIG-IP APM](https://junglewise.ai/threats/technologies/big-ip-apm): 3 vulnerabilities
- [F5 iControl REST](https://junglewise.ai/threats/technologies/icontrol-rest): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "F5 NGINX Ingress Controller vulnerabilities", https://junglewise.ai/threats/technologies/nginx-ingress-controller, 9 November 2026.