CVE-2026-52865 Details
Description
When NGINX Ingress Controller processes Ingress or TransportServer resources, an authenticated, remote attacker with permission to create or modify Ingress or TransportServer resources can cause the NGINX Ingress Controller process to terminate. Impact: The NGINX Ingress Controller control plane process terminates and enters a persistent crash loop while the malformed Ingress or TransportServer resource remains in the cluster. This vulnerability allows a remote, authenticated attacker with at least Ingress or TransportServer resource write access to cause a denial-of-service (DoS) on the NGINX Ingress Controller system. 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.
A denial-of-service vulnerability has been identified in NGINX Ingress Controller versions 3.6.0 through 3.7.2, 4.0.0 through 4.0.1, and 5.0.0 through 5.5.1. When the Ingress Controller processes Ingress or TransportServer resources, an authenticated, remote attacker with permission to create or modify these resources can cause the Ingress Controller process to terminate. This leads to a persistent crash loop in the control plane, while the malformed resource remains in the cluster. There is no exposure in the data plane; the issue is confined to the control plane.
To address this vulnerability, users can upgrade to NGINX Ingress Controller version 5.5.2. If a crash loop is already in progress, the malicious resource can be deleted to restore controller availability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://my.f5.com/manage/s/article/K000161834 | [email protected] | MitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| f5 nginx ingress controller | >= 3.5.0, <= 3.7.2 >= 4.0.0, <= 4.0.1 >= 5.0.0, < 5.5.2 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 16, 2026 | Initial Analysis | [email protected] |
| Jul 15, 2026 | CVE Modified | CISA-ADP |
| Jul 15, 2026 | New CVE Received | [email protected] |