CVE-2026-26963

MEDIUM EPSS 2.7%
Published Feb 20, 20264mo ago · Modified Feb 20, 20264mo ago
5.4 CVSS 3.1
Medium
Find Similar
Published Feb 20, 2026 4mo ago
Last Modified Feb 20, 2026 4mo ago

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.

CVSS Details

Base Score
5.4
Exploitability
2.8
Impact
2.5
Vector string
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector Adjacent
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
2.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-863 Incorrect Authorization Authorization

Affected Products 1

VendorProductVersionRange
ciliumcilium*≥1.18.0  –  <1.18.6

References 4

  • github.com https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885
    Patch
  • github.com https://github.com/cilium/cilium/pull/42892
    Issue Tracking
  • github.com https://github.com/cilium/cilium/releases/tag/v1.18.6
    Release Notes
  • github.com https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3
    PatchVendor Advisory

Remediation

  • github.com https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885
    Patch
  • github.com https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3
    PatchVendor Advisory