Vulnerability Description
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.17.15, 1.18.9, and 1.19.3, the output of cilium-bugtool can contain sensitive data when the tool is run against Cilium deployments with WireGuard encryption enabled. This issue has been patched in versions 1.17.15, 1.18.9, and 1.19.3.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cilium | Cilium | < 1.17.15 |
Related Weaknesses (CWE)
References
- https://github.com/cilium/cilium/releases/tag/v1.17.15ProductRelease Notes
- https://github.com/cilium/cilium/releases/tag/v1.18.9ProductRelease Notes
- https://github.com/cilium/cilium/releases/tag/v1.19.3ProductRelease Notes
- https://github.com/cilium/cilium/security/advisories/GHSA-gj49-89wh-h4gjMitigationVendor Advisory
FAQ
What is CVE-2026-41520?
CVE-2026-41520 is a vulnerability with a CVSS score of 7.9 (HIGH). Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.17.15, 1.18.9, and 1.19.3, the output of cilium-bugtool can contain sensitive data when t...
How severe is CVE-2026-41520?
CVE-2026-41520 has been rated HIGH with a CVSS base score of 7.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-41520?
Check the references section above for vendor advisories and patch information. Affected products include: Cilium Cilium.