Vulnerability · Published Dec 9, 2025 · Assigned by GitHub_M
CVE-2025-67499CNI Plugins Portmap nftables backend intercepts non-local traffic
Medium 6.6
In plain English
A medium-severity information exposure in plugins from containernetworking. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | singularity | 4.3.6-r0 | ALPINE-CVE-2025-67499 |
| Go | github.com/containernetworking/plugins | 1.9.0 | GHSA-jv3w-x3r3-g6rm |
| Go | github.com/containernetworking/plugins | 1.9.0 | GO-2025-4222 |
| Ubuntu:22.04:LTS | golang-github-containernetworking-plugins | no fix listed | UBUNTU-CVE-2025-67499 |
| Ubuntu:24.04:LTS | golang-github-containernetworking-plugins | no fix listed | UBUNTU-CVE-2025-67499 |
| Ubuntu:25.10 | golang-github-containernetworking-plugins | no fix listed | UBUNTU-CVE-2025-67499 |
| Ubuntu:26.04:LTS | golang-github-containernetworking-plugins | no fix listed | UBUNTU-CVE-2025-67499 |
| Ubuntu:26.10 | golang-github-containernetworking-plugins | no fix listed | UBUNTU-CVE-2025-67499 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| containernetworking | plugins | >= 1.6.0, < 1.9.0 |
Weakness: CWE-200 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
References
- https://github.com/containernetworking/plugins/security/advisories/GHSA-jv3w-x3r3-g6rm x_refsource_CONFIRM
- https://github.com/containernetworking/plugins/pull/1210 x_refsource_MISC
- https://github.com/containernetworking/plugins/releases/tag/v1.9.0 x_refsource_MISC