Read the docs
TI-2023-04644 Aliases CVE-2023-5044GHSA-fp9f-44c2-cw27

Improper input validation in Kubernetes ingress-nginx

Priority HIGH 70CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-94.

Summary

Code injection via nginx.ingress.kubernetes.io/permanent-redirect annotation.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.53692 99th percentileScored 2026-11-07
Fix Fixed ingress-nginx (Kubernetes): 1.9.0k8s.io/ingress-nginx (Go): 1.9.0

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
Kubernetesingress-nginxbefore 1.9.01.9.0Patch availableCNA
—k8s.io/ingress-nginx (Go)before 1.9.01.9.0Patch availableGHSA-fp9f-44c2-cw27
  • ingress-nginx VendorKubernetes Affected before 1.9.0 Fixed in 1.9.0 Patch available CNA
  • k8s.io/ingress-nginx (Go) Vendor— Affected before 1.9.0 Fixed in 1.9.0 Patch available GHSA-fp9f-44c2-cw27

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:*before 1.9.0VulnerableKubernetes
  • cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:* Versions before 1.9.0 Vulnerable ·Kubernetes

Remediation

  • Fix · CNA ingress-nginx (Kubernetes) Fixed in 1.9.0
  • Fix · GHSA-fp9f-44c2-cw27 k8s.io/ingress-nginx (Go) Fixed in 1.9.0 Advisory →

Fixed in the same release

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

  • Release ·

    Kubernetes ingress-nginx 1.9.0

    2 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM

    Other records, highest priority first

    • TI-2023-04643 Improper input validation in Kubernetes ingress-nginxPriority MEDIUM 43
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-5044
  2. 2026-10-03 Alias added: GHSA-fp9f-44c2-cw27

References

Advisory 3

Other 4

  • TI-2026-02839 ingress-nginx rewrite-target nginx configuration injection CVSS 3.1HIGH 8.8
  • TI-2023-04643 Improper input validation in Kubernetes ingress-nginx CVSS 3.1HIGH 8.8
  • TI-2022-04479 Improper input validation in Kubernetes ingress-nginx CVSS 3.1HIGH 8.8
  • TI-2021-07835 Ingress-nginx path can be pointed to service account token file CVSS 3.1HIGH 8.1
  • TI-2021-07833 Ingress-nginx custom snippets allows retrieval of ingress-nginx serviceaccount token and secrets across all namespaces CVSS 3.1HIGH 7.6
  • TI-2021-07836 Ingress-nginx directive injection via annotations CVSS 3.1HIGH 7.6
See all 8 →

Sources

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