Is github.com/cilium/cilium affected by CVE-2026-33726?

Go github.com/cilium/cilium is affected in =1.18.0 =1.19.0 <1.19.2.

Is CVE-2026-33726 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

medium

CVE-2026-33726

Q: Is CVE-2026-33726 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

Go · github.com/cilium/cilium

Summary

Cilium L7 proxy may bypass Kubernetes NetworkPolicy for same-node traffic in github.com/cilium/cilium

Severity: medium
EPSS: 0.2% (p15)
Also known as: GHSA-hxv8-4j4r-cqgv, BIT-cilium-2026-33726, BIT-cilium-operator-2026-33726, BIT-hubble-relay-2026-33726, GO-2026-4856
Published: 2026-03-26

References

https://github.com/cilium/cilium/security/advisories/GHSA-hxv8-4j4r-cqgv
https://github.com/cilium/cilium/pull/44693
https://docs.cilium.io/en/stable/network/concepts/routing/#routing

Related advisories

CVE-2026-41520 — high · Go/github.com/cilium/cilium
CVE-2026-26963 — medium · Go/github.com/cilium/cilium
CVE-2025-64715 — medium · Go/github.com/cilium/cilium

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.