---
id: CVE-2025-67499
title: >-
  The CNI portmap plugin allows containers to emulate opening a host port,
  forwarding that traffic to the container
summary: >-
  The CNI portmap plugin allows containers to emulate opening a host port,
  forwarding that traffic to the container. Versions 1.6.0 through 1.8.0 
  inadvertently forward all traffic with the same destination port as the host
  port when the p…
severity: medium
cvss: 6.6
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H'
cwe:
  - CWE-200
vendor: linuxfoundation
product: cni_network_plugins
affected:
  - 'cni_network_plugins >= 1.6.0, < 1.9.0'
patched:
  - cni_network_plugins 1.9.0
published: '2025-12-10'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T21:10:00.183'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-67499'
references:
  - url: 'https://github.com/containernetworking/plugins/pull/1210'
    label: security-advisories@github.com
  - url: 'https://github.com/containernetworking/plugins/releases/tag/v1.9.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/containernetworking/plugins/security/advisories/GHSA-jv3w-x3r3-g6rm
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00139
epssPercentile: 0.02883
ingestedAt: '2026-10-14T21:57:04.774Z'
---

## Overview

The CNI portmap plugin allows containers to emulate opening a host port, forwarding that traffic to the container. Versions 1.6.0 through 1.8.0  inadvertently forward all traffic with the same destination port as the host port when the portmap plugin is configured with the nftables backend, thus ignoring the destination IP. This includes traffic not intended for the node itself, i.e. traffic to containers hosted on the node. Containers that request HostPort forwarding can intercept all traffic destined for that port. This requires that the portmap plugin be explicitly configured to use the nftables backend. This issue is fixed in version 1.9.0. To workaround, configure the portmap plugin to use the iptables backend. It does not have this vulnerability.

## Affected

- `cni_network_plugins >= 1.6.0, < 1.9.0`

## Remediation

Upgrade past the affected range:

- `cni_network_plugins 1.9.0`