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01 Record

CVE-2026-33726

Cilium L7 proxy may bypass Kubernetes NetworkPolicy for same-node traffic

MediumPUBLISHEDCNA: GitHub_M
CNA base score5.4 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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02 Description

Cilium L7 proxy may bypass Kubernetes NetworkPolicy for same-node traffic

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.25% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 17.0% of scored records. A rank, not a probability.
NVD base score
4.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD analysis status
Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-03-27 00:23Z7 MO AGO
Last updated
2026-03-27 13:50Z7 MO AGO
Reserved
2026-03-23
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Medium (CVSS 5.4)
CNA CVSS vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weaknesses
  • CWE-284Improper Access ControlPillar
  • CWE-863Incorrect AuthorizationClass
Data version
5.2
Document digest
d794d64464b89f96d52f4ff935f6fb62a4444cf2a8d653deb7464e5f7adeb718

05 Affected products

VendorProductVersionsPlatforms
ciliumcilium< 1.17.14, >= 1.18.0, < 1.18.8, >= 1.19.0, < 1.19.2—

06 References