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CVE Vulnerability Details :
CVE-2026-26963
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-19 Feb, 2026 | 23:38
Updated At-20 Feb, 2026 | 15:36
Rejected At-
▼CVE Numbering Authority (CNA)
Cilium may not enforce host firewall policies when Native Routing, WireGuard and Node Encryption are enabled

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.

Affected Products
Vendor
cilium
Product
cilium
Versions
Affected
  • >= 1.18.0, < 1.18.6
Problem Types
TypeCWE IDDescription
CWECWE-863CWE-863: Incorrect Authorization
Type: CWE
CWE ID: CWE-863
Description: CWE-863: Incorrect Authorization
Metrics
VersionBase scoreBase severityVector
3.16.1MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Version: 3.1
Base score: 6.1
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3
x_refsource_CONFIRM
https://github.com/cilium/cilium/pull/42892
x_refsource_MISC
https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885
x_refsource_MISC
https://github.com/cilium/cilium/releases/tag/v1.18.6
x_refsource_MISC
Hyperlink: https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/cilium/cilium/pull/42892
Resource:
x_refsource_MISC
Hyperlink: https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885
Resource:
x_refsource_MISC
Hyperlink: https://github.com/cilium/cilium/releases/tag/v1.18.6
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found