THREATPORT/VULNERABILITY/CVE-2026-3288
HIGH SEVERITY

CVE-2026-3288

Ingress Nginx vulnerability

CVSS
8.8
EPSS
6.7%
EPSS pct
93th
Exploited
No known
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.)
Affected vendor
Kubernetes
Affected product
Ingress Nginx
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-20 — Improper Input Validation
Published
2026-03-09

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 6.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2026-3288

  • Confirm whether Kubernetes Ingress Nginx is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2026-3288.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2026-3288

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2026-3288 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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