8.8

CVE-2026-1580: kubernetes ingress-nginx Improper Input Validation

CVSS: 8.8v3.1HighDeferred
AliasesCGA-3cgj-x9r6-jj2pCGA-44v9-7jjc-fx5vCGA-4rj4-g8jg-c96m
Published 03-02-2026Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2026-1580 is a high (CVSS 8.8) Improper Input Validation vulnerability in kubernetes ingress-nginx. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.2% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.54%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 3
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:0403-1CGA-6H8J-HM63-V2V2

Timeline

  1. 03-02-2026
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

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 metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.54%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

+0.05 pp

From 0.49% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.54%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard10 products
  • ingress-nginx-controller-1.12All versions (No fix recorded)
  • ingress-nginx-controller-1.13< 1.13.9-r14
  • ingress-nginx-controller-1.14< 1.14.5-r16
  • ingress-nginx-controller-1.15All versions (No fix recorded)
  • ingress-nginx-controller-fips-1.12All versions (No fix recorded)
Wolfi5 products
  • ingress-nginx-controller-1.12All versions (No fix recorded)
  • ingress-nginx-controller-1.14< 1.14.5-r16
  • ingress-nginx-controller-1.15All versions (No fix recorded)
  • ingress-nginx-custom-error-pages-1.14< 1.14.5-r27
  • ingress-nginx-custom-error-pages-compat-1.14All versions (No fix recorded)
K8s.io1 product
  • ingress-nginx< 1.13.7 | ≥ 1.14.0, < 1.14.3 | All versions (No fix recorded)
Kubernetes1 product

4 vendors · 17 products

References

5 links