CVE-2026-41186 Unauthenticated Go pprof exposure in Calico debug server

Medium 6.0 Published 30 Jul 2026 Updated 30 Jul 2026

Unauthenticated access to Go pprof endpoints in Calico debug server allows attackers to read sensitive process memory and command-line arguments.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2026-41186?

CVE-2026-41186 is a medium-severity vulnerability in Tigera Calico, published on 30 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

When Calico's shared debug server is enabled (disabled by default), the Calico kube-controllers and Goldmane components bind their Go pprof debug listener to 0.0.0.0 without authentication. Any pod with network reachability to the listener can retrieve the process heap, goroutine stacks (including function arguments), and command-line arguments. Depending on the process's in-memory state, the heap may contain sensitive material. The debug listener is opt-in but is unsafe when enabled because it offers no authentication and no safe localhost-only binding option.

Weakness: CWE-489, CWE-200

Which versions are affected by CVE-2026-41186?

It affects 1 product.

Products include Tigera Calico.

How do I fix CVE-2026-41186?

Change a configuration setting.

Is CVE-2026-41186 being exploited?

There is no known exploitation of CVE-2026-41186 in the wild and no public exploit code.

Sources

Also known as GHSA-h3h4-j2qv-pv4j, MINI-2chq-629r-v3fj, MINI-5rq9-22fh-j2cx, MINI-93cm-mxjp-29q4, MINI-g572-cvhf-j396, MINI-hp9h-h8c5-8gq5 and 3 more.