CVE-2026-66781 Submariner-operator: pprof debug endpoint enabled by default on 0.0.0.0:8082 without authentication
An attacker can access unencrypted IPsec keys via a debug endpoint, allowing decryption of inter-cluster network traffic.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-66781?
CVE-2026-66781 is a medium-severity vulnerability in Red Hat Advanced Cluster Management for Kubernetes 2, published on 18 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in the Submariner operator. The Submariner Custom Resource (CR), used for configuring network connectivity, stores the IPsec pre-shared key (PSK) in an unencrypted format. This key, which is critical for securing communication between Kubernetes clusters, can be accessed by unauthorized parties. Such access enables an attacker to passively decrypt network traffic flowing between any two clusters in the mesh, resulting in sensitive information disclosure.
Weakness: CWE-749
Which versions are affected by CVE-2026-66781?
How do I fix CVE-2026-66781?
No fix has been published for CVE-2026-66781 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-66781 being exploited?
There is no known exploitation of CVE-2026-66781 in the wild and no public exploit code.
Sources
Also known as GHSA-gcch-g8g2-6852.