CVE-2022-4886 — ingress-nginx
HIGHCVE-2022-4886 is a high-severity (CVSS 8.8) Improper Input Validation vulnerability in k8s.io/ingress-nginx. A fix is available for k8s.io/ingress-nginx — see the affected versions and patch details below.
Ingress-nginx `path` sanitization can be bypassed with `log_format` directive
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- 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-2022-4886.
EPSS Exploitation Probability
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
k8s.io/ingress-nginxReal-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
Ingress-nginx path sanitization can be bypassed with log_format directive.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | k8s.io/ingress-nginx | all versions | 1.8.0go get k8s.io/ingress-nginx@v1.8.0 |
Affected Products
ingress-nginxkubernetesDetection & mitigation playbook
Open-source dependencyDetect
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.
Fix
Update k8s.io/ingress-nginx to 1.8.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-4886 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is CVE-2022-4886 in your dependencies?
Find it across Go, including transitive dependencies.