How to fix CVE-2025-30163?

During next maintenance window: Apply vendor patches when convenient. Vendor patch is available.

Is Cilium affected by CVE-2025-30163?

CVE-2025-30163 is a low-severity vulnerability in Cilium (CVSS 3.4). The limited severity suggests constrained impact, typically requiring specific conditions or local access for exploitation. A patch is available and can be applied during standard maintenance windows.

CVE-2025-30163

LOW

2025-03-24 [email protected]

3.4

CVSS 3.1

CVSS Vector

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

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:33 vuln.today

Patch Released

Mar 28, 2026 - 18:33 nvd

Patch available

CVE Published

Mar 24, 2025 - 19:15 nvd

LOW 3.4

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.

Analysis

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Rated low severity (CVSS 3.4), this vulnerability is no authentication required. This Incorrect Authorization vulnerability could allow attackers to bypass authorization checks to access restricted resources.

Technical Context

This vulnerability is classified as Incorrect Authorization (CWE-863), which allows attackers to bypass authorization checks to access restricted resources. 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. Affected products include: Cilium.

Affected Products

Cilium.

Remediation

A vendor patch is available. Apply the latest security update as soon as possible. Review and test authorization logic, implement consistent access control checks, use centralized authorization framework.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.0

CVSS: +17

POC: 0

CVE-2025-30163 vulnerability details – vuln.today

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CVE-2025-30163

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CVE-2025-30163

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Lifecycle Timeline

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Description

Analysis

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