CVE-2025-32793 Cilium packets from terminating endpoints may not be encrypted in Wireguard-enabled clusters
A race condition in Cilium allows unencrypted packets from terminating endpoints to bypass WireGuard encryption, exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-32793?
CVE-2025-32793 is a medium-severity vulnerability in cilium, published on 21 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2025-32793?
10 open source packages ship an affected version, including github.com/cilium/cilium, cilium and cilium-operator. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/cilium/cilium Go | From 1.13.0 | 1.15.16, 1.16.9, 1.17.3 |
github.com/cilium/cilium Go | From 1.13.0 | 1.15.16 |
github.com/cilium/cilium Go | From 1.13.0 | 1.15.16 |
github.com/cilium/cilium Go | From 1.16.0 | 1.16.9 |
github.com/cilium/cilium Go | From 1.16.0 | 1.16.9 |
github.com/cilium/cilium Go | From 1.17.0 | 1.17.3 |
4 more packages
github.com/cilium/cilium Go | From 1.17.0 | 1.17.3 |
cilium Bitnami | From 1.13.0 | 1.17.3 |
cilium-operator Bitnami | From 1.13.0 | 1.17.3 |
hubble-relay Bitnami | From 1.13.0 | 1.17.3 |
Products include Cilium Cilium.
How do I fix CVE-2025-32793?
Upgrade github.com/cilium/cilium to a fixed version for your release line: 1.15.16, 1.16.9 or 1.17.3.
Is CVE-2025-32793 being exploited?
There is no known exploitation of CVE-2025-32793 in the wild and no public exploit code.
Other vulnerabilities in cilium
- CVE-2026-49445 Cilium: Sensitive information disclosure and cluster disruption via local Envoy admin socket access
- CVE-2022-29178 Incorrect Default Permissions in Cilium
- CVE-2024-28860 Insecure IPsec transport encryption in Cilium
- CVE-2026-41520 Cillium exposes sensitive information included in the cilium-bugtool debug archive
- CVE-2024-37307 Cilium leaks sensitive information in cilium-bugtool
Sources
Also known as BIT-cilium-2025-32793, BIT-cilium-operator-2025-32793, BIT-hubble-relay-2025-32793, GHSA-5vxx-c285-pcq4, GO-2025-3635, MINI-3383-pg63-cpc2 and 3 more.