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TI-2026-37967 Aliases CVE-2026-52865GHSA-gv6x-94m7-c6hh

NGINX Ingress Controller vulnerability

Priority LOW 32CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-476.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00501 43rd percentileScored 2026-11-07
Fix Fixed NGINX Ingress Controller (F5): 5.5.2, 2026-lts-r3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
F5NGINX Ingress Controller5.0.0 to before 5.5.2; 2026-lts-r1 to before 2026-lts-r35.5.2, 2026-lts-r3Patch availableCNA
  • NGINX Ingress Controller VendorF5 Affected 5.0.0 to before 5.5.2; 2026-lts-r1 to before 2026-lts-r3 Fixed in 5.5.2, 2026-lts-r3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*3.5.0 – 3.7.2; 4.0.0 – 4.0.1; 5.0.0 to before 5.5.2VulnerableF5
  • cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:* Versions 3.5.0 – 3.7.2; 4.0.0 – 4.0.1; 5.0.0 to before 5.5.2 Vulnerable ·F5

Remediation

  • Fix · CNA NGINX Ingress Controller (F5) Fixed in 5.5.2, 2026-lts-r3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    F5 NGINX Ingress Controller 2026-lts-r3, 5.5.2

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-40223 NGINX Ingress Controller vulnerabilityPriority MEDIUM 40
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-52865
  2. 2026-10-03 Alias added: GHSA-gv6x-94m7-c6hh

References

Patch 1

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2026-31136 NGINX ngx_http_rewrite_module vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-30813 NGINX Map directive and Regex matching vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-08132 NGINX ngx_http_rewrite_module vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-30812 NGINX Open-Source ngx_http_v3_module vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-30432 NGINX ngx_http_proxy_v2_module and ngx_http_grpc_module vulnerability CVSS 4.0CRITICAL 9.2
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences