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CVE-2026-26963

MEDIUM

6.1

Description

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Versions 1.18.0 through 1.18.5 will incorrectly permit traffic from Pods on other nodes when Native Routing, WireGuard and Node Encryption are enabled. This issue has been fixed in version 1.18.6.

CVE Details

CVSS v3.1 Score6.1

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Attack VectorADJACENT_NETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/20/2026

Last Modified2/20/2026

Sourcenvd

Honeypot Sightings0

Affected Products

cilium:cilium

Weaknesses (CWE)

CWE-863

References

https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885(security-advisories@github.com)

https://github.com/cilium/cilium/pull/42892(security-advisories@github.com)

https://github.com/cilium/cilium/releases/tag/v1.18.6(security-advisories@github.com)

https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3(security-advisories@github.com)

IOC Correlations

No correlations recorded

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