Improper input validation in Kubernetes Ingress-nginx
CVE-2026-3288
A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/rewrite-target` Ingress annotation can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingr…
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.000 (15.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Kubernetes Ingress-nginx — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- jordan@liggitt.net (Third Party Advisory, Issue Tracking)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Third Party Advisory, Mitigation)
Frequently asked questions
- What is CVE-2026-3288?
- CVE-2026-3288 is a high-severity vulnerability in Kubernetes Ingress-nginx, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2026-03-09.
- How severe is CVE-2026-3288?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2026-3288 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.