Auth bypass in Cilium

CVE-2026-33726

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.17.14, 1.18.8, and 1.19.2, Ingress Network Policies are not enforced for traffic from pods to L7 Services (Envoy, GAMMA) with a…

EPSS: 0.000 (1.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

  • Cilium — versions < 1.17.14, >= 1.18.0, < 1.18.8, >= 1.19.0, < 1.19.2

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-33726?
CVE-2026-33726 is a medium-severity vulnerability in Cilium, classified under Improper Access Control. CVSS score: 5.4/10. Published 2026-03-27.
How severe is CVE-2026-33726?
Medium severity. CVSS v3 base score is 5.4 out of 10.