Description
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Node based network policies (`fromNodes` and `toNodes`) will incorrectly permit traffic to/from non-node endpoints that share the labels specified in `fromNodes` and `toNodes` sections of network policies. Node based network policy is disabled by default in Cilium. This issue affects: Cilium v1.16 between v1.16.0 and v1.16.7 inclusive and v1.17 between v1.17.0 and v1.17.1 inclusive. This issue is fixed in Cilium v1.16.8 and v1.17.2. Users can work around this issue by ensuring that the labels used in `fromNodes` and `toNodes` fields are used exclusively by nodes and not by other endpoints.
References (3)
Core 3
Core References
Mitigation, Patch, Third Party Advisory x_refsource_confirm
https://github.com/cilium/cilium/security/advisories/GHSA-c6pf-2v8j-96mc
Patch x_refsource_misc
https://github.com/cilium/cilium/pull/36657
Product x_refsource_misc
https://docs.cilium.io/en/stable/security/policy/language/#node-based
Scores
CVSS v3
3.4
EPSS
0.0018
EPSS Percentile
8.0%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-863
Status
published
Products (3)
cilium/cilium
1.16.0 - 1.16.8
cilium/cilium
1.16.0 - 1.16.8Go
cilium/cilium
1.17.0 - 1.17.2Go
Published
Mar 24, 2025
Tracked Since
Feb 18, 2026