Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tigera | Calico | < 3.21.7 |
Related Weaknesses (CWE)
References
- https://github.com/projectcalico/calico/pull/12491Issue TrackingPatch
- https://github.com/projectcalico/calico/pull/12633Issue TrackingPatch
- https://github.com/projectcalico/calico/pull/12634Issue TrackingPatch
- https://www.tigera.io/security-bulletins/tta-2026-004/Vendor Advisory
FAQ
What is CVE-2026-41186?
CVE-2026-41186 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 wi...
How severe is CVE-2026-41186?
CVE-2026-41186 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-41186?
Check the references section above for vendor advisories and patch information. Affected products include: Tigera Calico.