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.
CVE-2025-67499
This medium-severity CVE scores 6.6 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 98% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 3.6
- EG Score
- 6.6(medium)
- EG Risk
- —
- EPSS
- 2.3%
- KEV
- Not listed
Published
December 10, 2025
Last Modified
June 17, 2026
References (3)
- security-advisories@githubhttps://github.com/containernetworking/plugins/pull/1210
- security-advisories@githubhttps://github.com/containernetworking/plugins/releases/tag/v1.9.0
- security-advisories@githubhttps://github.com/containernetworking/plugins/security/advisories/GHSA-jv3w-x3r3-g6rm
Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/containernetworking/plugins | — | 1.9.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 38× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-22 14:08 UTCEPSS rescore
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- 2026-06-24 10:02 UTCNVD updateCVSS v3 → 3.6 · severity → LOW
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- 2026-05-29 18:00 UTCEG score recompute
- 2026-05-29 13:44 UTCEPSS rescore
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