---
id: CVE-2025-32793
aliases:
  - GHSA-5vxx-c285-pcq4
  - BIT-cilium-2025-32793
  - BIT-cilium-operator-2025-32793
  - BIT-hubble-relay-2025-32793
  - GO-2025-3635
title: >-
  In Cilium, packets from terminating endpoints may not be encrypted in
  Wireguard-enabled clusters
summary: >-
  In Cilium, packets from terminating endpoints may not be encrypted in
  Wireguard-enabled clusters
severity: medium
cvss: 4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N'
vendor: cilium
product: github.com/cilium/cilium
ecosystem: go
affected:
  - 'github.com/cilium/cilium >= 1.13.0, < 1.15.16'
  - 'github.com/cilium/cilium >= 1.16.0, < 1.16.9'
  - 'github.com/cilium/cilium >= 1.17.0, < 1.17.3'
patched:
  - github.com/cilium/cilium 1.15.16
  - github.com/cilium/cilium 1.16.9
  - github.com/cilium/cilium 1.17.3
published: '2025-04-21'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:23.531960272Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-5vxx-c285-pcq4'
references:
  - url: 'https://github.com/cilium/cilium/security/advisories/GHSA-5vxx-c285-pcq4'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-32793'
  - url: 'https://github.com/cilium/cilium/pull/38592'
  - url: >-
      https://github.com/cilium/cilium/commit/e8543eef05126e9ba8a845dc74e96f4e30f6dba9
  - url: 'https://github.com/cilium/cilium'
tags:
  - osv
  - go
epss: 0.0014
epssPercentile: 0.02722
ingestedAt: '2026-09-12T03:13:01.756Z'
---

## Overview

### Impact

When using [Wireguard transparent encryption](https://docs.cilium.io/en/stable/security/network/encryption-wireguard/#encryption-wg) in a Cilium cluster, packets that originate from a terminating endpoint can leave the source node without encryption due to a race condition in how traffic is processed by Cilium.

### Patches

This issue has been patched in https://github.com/cilium/cilium/pull/38592.

This issue affects:

- Cilium v1.15 between v1.15.0 and v1.15.15 inclusive
- Cilium v1.16 between v1.16.0 and v1.16.8 inclusive
- Cilium v1.17 between v1.17.0 and v1.17.2 inclusive

This issue is fixed in:

- Cilium v1.15.16
- Cilium v1.16.9
- Cilium v1.17.3

### Workarounds

There is no workaround to this issue.

### Acknowledgements

The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @gandro  and @pippolo84 for reporting this issue and to @julianwiedmann for the patch.

### For more information

If you think you have found a vulnerability affecting Cilium, we strongly encourage you to report it to our security mailing list at [security@cilium.io](mailto:security@cilium.io). This is a private mailing list for the Cilium security team, and your report will be treated as top priority.

## Affected packages

- `github.com/cilium/cilium >= 1.13.0, < 1.15.16`
- `github.com/cilium/cilium >= 1.16.0, < 1.16.9`
- `github.com/cilium/cilium >= 1.17.0, < 1.17.3`

## Remediation

Upgrade to a patched release:

- `github.com/cilium/cilium 1.15.16`
- `github.com/cilium/cilium 1.16.9`
- `github.com/cilium/cilium 1.17.3`