CVE-2026-24513Network attack vector

Authentication bypass via ignored X-Code header

Published Feb 3, 2026 · Updated Feb 3, 2026

Authentication bypass in Kubernetes ingress-nginx before 1.13.7 and 1.14.0 through 1.14.2 allows attackers to access protected content. A controller-wide custom-errors backend that ignores the X-Code header mishandles 401 or 403 responses from auth-url and serves the protected Ingress content. Exploitation requires an administrator to configure that defective external backend; the built-in backend and per-Ingress custom errors are unaffected.

CVSS severity3.1
Low
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Kubernetes ingress-nginx before 1.13.7 and 1.14.0 through 1.14.2 allows attackers to access protected content. A controller-wide custom-errors backend that ignores the X-Code header mishandles 401 or 403 responses from auth-url and serves the protected Ingress content. Exploitation requires an administrator to configure that defective external backend; the built-in backend and per-Ingress custom errors are unaffected.

The record

CVE
CVE-2026-24513
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
Kubernetes
Product
ingress-nginx
Classifications
CWE-754, T1190
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

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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1190Exploit Public-Facing Application

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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