CVE-2026-1580 — Improper Input Validation in Kubernetes Ingress-nginx

CWE-20 — Improper Input Validation6 documents5 sources
Severity
8.8HIGHNVD
EPSS
0.1%
top 83.97%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Kubernetes Ingress-nginxK8s.io Ingress-nginx
Timeline
PublishedFeb 3
Latest updateFeb 5

Description

A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/auth-method` 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.)

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages2 packages

▶CVEListV5kubernetes/ingress-nginx< 1.13.7+1
▶Gok8s.io/ingress-nginx1.14.0 — 1.14.3+1

🔴Vulnerability Details

4
OSV
ingress-nginx's `nginx.ingress.kubernetes.io/auth-method` Ingress annotation can be used to inject configuration into nginx in k8s.io/ingress-nginx↗2026-02-05
▶
GHSA
ingress-nginx's `nginx.ingress.kubernetes.io/auth-method` Ingress annotation can be used to inject configuration into nginx↗2026-02-04
▶
OSV
ingress-nginx's `nginx.ingress.kubernetes.io/auth-method` Ingress annotation can be used to inject configuration into nginx↗2026-02-04
▶
CVEList
ingress-nginx auth-method nginx configuration injection↗2026-02-03
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-1580 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-1580 — Improper Input Validation in Kubernetes | cvebase