CVE•Published 2026-03-09•Modified 2026-05-06•1 article on news•6 live references•NVD data

CVE-2026-3288Kubernetes · Ingress-nginx

Vulnerability data via NVD (ingested)

CVSS v3.1

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS percentile

Exploit Prediction Scoring System · top 86% of all CVEs

Weaknesses (CWE)

CWE-20Improper Input Validation

Description

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 ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)

Timeline

Published 2026-03-09

Modified 2026-05-06

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-3288

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Kubernetes Ingress-nginx"

All exposed Kubernetes Ingress-nginx instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Ingress-nginx"

HTTP body or banner mentions "Ingress-nginx" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-3288