CVE-2026-1580Network attack vector

Controller code execution via unanchored method validation

Published Feb 3, 2026 · Updated Feb 3, 2026

Configuration injection in Kubernetes ingress-nginx before 1.13.7 and 1.14.0 through 1.14.2 allows remote authenticated users to execute code. The auth-method annotation validator used an unanchored HTTP-method regex, so a value containing a valid method plus injected NGINX directives passed validation and entered generated configuration. Ingress creation privileges are required; successful exploitation runs in the controller context and exposes controller-readable Secrets, which span the cluster by default.

CVSS severity8.8
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Configuration injection in Kubernetes ingress-nginx before 1.13.7 and 1.14.0 through 1.14.2 allows remote authenticated users to execute code. The auth-method annotation validator used an unanchored HTTP-method regex, so a value containing a valid method plus injected NGINX directives passed validation and entered generated configuration. Ingress creation privileges are required; successful exploitation runs in the controller context and exposes controller-readable Secrets, which span the cluster by default.

The record

CVE
CVE-2026-1580
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
Kubernetes
Product
ingress-nginx
Classifications
CWE-20, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.13.7
  2. Affected versionversion=0 <1.14.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kubernetes · ingress-nginxversion=0 <1.13.7; version=0 <1.14.2

Published CVSS scores

8.8KubernetesCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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