CVE-2026-32769 — fullchain
Fix: ctfer-io/fullchain@dbcb901CVE-2026-32769 is a CWE-284 vulnerability in github.com/ctfer-io/fullchain. A fix is available for github.com/ctfer-io/fullchain — see the affected versions and patch details below.
Fullchain's Invalid NetworkPolicy enables a malicious actor to pivot into another namespace
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-32769.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
Real-World Exposure
github.com/ctfer-io/fullchainReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
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.
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 | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/ctfer-io/fullchain | all versions | 0.1.1go get github.com/ctfer-io/fullchain@v0.1.1 |
Affected Products
fullchainctferDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/ctfer-io/fullchain, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/ctfer-io/fullchain to 0.1.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-32769 is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.
Frequently Asked Questions
Is CVE-2026-32769 in your dependencies?
Find it across Go, including transitive dependencies.