NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
🐹
🐹 Go
Not in CISA KEV
HIGH severity

CVE-2023-5044 — ingress-nginx

HIGH

CVE-2023-5044 is a high-severity (CVSS 7.6) Improper Input Validation vulnerability in k8s.io/ingress-nginx. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for k8s.io/ingress-nginx — see the affected versions and patch details below.

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

Also known asGHSA-fp9f-44c2-cw27GO-2024-2428
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
2 known
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-5044.

EPSS Exploitation Probability

via FIRST.org ↗
53.7%probability of exploitation in next 30 days
High Risk-5.87%
Lower risk than most CVEs99th percentile — riskier than 99% of all scored CVEsHighest risk
0.00%24.8%49.7%74.5%9.7%53.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐹k8s.io/ingress-nginx

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

A security issue was identified in ingress-nginx where the nginx.ingress.kubernetes.io/permanent-redirect annotation on an Ingress object (in the networking.k8s.io or extensions API group) can be used to inject arbitrary commands, and obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gok8s.io/ingress-nginxall versions1.9.0go get k8s.io/ingress-nginx@v1.9.0

Affected Products

1 product · 1 configurations
Application
ingress-nginxkubernetes
< 1.9.0
range
Exploits & PoCs
2

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

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

github.comGithubOct 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for k8s.io/ingress-nginx, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update k8s.io/ingress-nginx to 1.9.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-5044 is resolved across your whole dependency graph.

  3. Workarounds

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Frequently Asked Questions

A security issue was identified in [ingress-nginx](https://github.com/kubernetes/ingress-nginx) where the nginx.ingress.kubernetes.io/permanent-redirect annotation on an Ingress object (in the networking.k8s.io or extensions API group) can be used to inject arbitrary commands, and obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster.
O3 Security · Impact-Aware SCA

Is CVE-2023-5044 in your dependencies?

Find it across Go, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2023-5044: ingress-nginx — Fixed in 1.9.0