CVE-2026-32769
Fullchain's Invalid NetworkPolicy enables a malicious actor to pivot into another namespace
Impact
### Impact Due to a mis-written NetworkPolicy, a malicious actor can pivot from a subverted application to any Pod out of the origin namespace. This breaks the security-by-default property expected as part of the deployment program, leading to a potential lateral movement. ### Patch Removing the `inter-ns` NetworkPolicy patches the vulnerability. If updates are not possible in production environments, we recommend to manually delete it and update as soon as possible. ### Workaround Given your context, delete the failing network policy that should be prefixed by `inter-ns-` in the target namespace. You can use the following to delete all matching network policy. If unsure of the outcome, please do it manually. ```bash for ns in $(kubectl get ns -o jsonpath='{.items[*].metadata.name}' | tr ' ' '\n' | grep '^ns-'); do kubectl -n "$ns" get networkpolicy -o name \ | grep '^networkpolicy.networking.k8s.io/inter-ns-' \ | xargs -r kubectl -n "$ns" delete done ```
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/ctfer-io/fullchain | < 0.1.1 | 0.1.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Ctfer | Fullchain | before 0.1.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/ctfer-io/fullchain/commit/dbcb90178bcb07a3f5a1efa4c6350f3a6ce34f51
- https://github.com/ctfer-io/fullchain/releases/tag/v0.1.1
- https://github.com/ctfer-io/fullchain/security/advisories/GHSA-hxm7-9q36-c77f
- https://github.com/advisories/GHSA-hxm7-9q36-c77f
- https://nvd.nist.gov/vuln/detail/CVE-2026-32769