High severity7.9GHSA Advisory· Published May 8, 2026· Updated May 13, 2026
CVE-2026-41520
CVE-2026-41520
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/cilium/ciliumGo | < 1.17.15 | 1.17.15 |
github.com/cilium/ciliumGo | >= 1.18.0, < 1.18.9 | 1.18.9 |
github.com/cilium/ciliumGo | >= 1.19.0, < 1.19.3 | 1.19.3 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
7- github.com/advisories/GHSA-gj49-89wh-h4gjghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-41520ghsaADVISORY
- docs.cilium.io/en/stable/security/network/encryption-wireguardghsaWEB
- github.com/cilium/cilium/releases/tag/v1.17.15nvdWEB
- github.com/cilium/cilium/releases/tag/v1.18.9nvdWEB
- github.com/cilium/cilium/releases/tag/v1.19.3nvdWEB
- github.com/cilium/cilium/security/advisories/GHSA-gj49-89wh-h4gjnvdWEB
News mentions
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