CVE-2022-4886Network attack vector

Controller credential theft via path directive injection

Published Oct 25, 2023 · Updated Feb 13, 2025

Improper input validation in Kubernetes ingress-nginx before 1.8.0 allows remote authenticated users to steal controller credentials. The controller accepts NGINX log_format directives in spec.rules[].http.paths[].path despite sanitizing that field, then renders them into NGINX configuration. Creating or updating an Ingress object is required; the default controller credential can access every cluster secret, while chrooted controllers permit command execution without credential extraction.

CVSS severity8.8
High
EPSS probability1.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Kubernetes ingress-nginx before 1.8.0 allows remote authenticated users to steal controller credentials. The controller accepts NGINX log_format directives in spec.rules[].http.paths[].path despite sanitizing that field, then renders them into NGINX configuration. Creating or updating an Ingress object is required; the default controller credential can access every cluster secret, while chrooted controllers permit command execution without credential extraction.

The record

CVE
CVE-2022-4886
Published
Oct 25, 2023
Updated
Feb 13, 2025
Vendor
Kubernetes
Product
ingress-nginx
Classifications
CWE-20, T1552.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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 <1.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kubernetes · ingress-nginxversion=0 <1.8.0

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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 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-20Improper Input Validation
T1552.007Unsecured Credentials: Container API

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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