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I. Basic Information for CVE-2026-26963
Vulnerability Information

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Vulnerability Title
Cilium may not enforce host firewall policies when Native Routing, WireGuard and Node Encryption are enabled
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cilium 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cilium是Cilium开源的一个开源软件。用于提供和透明地保护应用程序工作负载(如应用程序容器或进程)之间的网络连接和负载平衡。 Cilium 1.18.0版本至1.18.5版本存在安全漏洞,该漏洞源于启用原生路由、WireGuard和节点加密时错误允许来自其他节点Pod的流量,可能导致网络策略绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
ciliumcilium >= 1.18.0, < 1.18.6 -
II. Public POCs for CVE-2026-26963
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III. Intelligence Information for CVE-2026-26963
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IV. Related Vulnerabilities
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