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OpenAdvisories
High · 7.9 CVE-2026-41520 BIT-cilium-2026-41520BIT-cilium-operator-2026-41520BIT-hubble-relay-2026-41520EUVD-2026-28845GHSA-gj49-89wh-h4gjGO-2026-5400

Cillium exposes sensitive information included in the cilium-bugtool debug archive

Published May 8, 2026 · Updated May 13, 2026 · Assigned by GitHub_M

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 products

VendorProductAffectedFixed
cilium cilium < 1.17.15, >= 1.18.0, < 1.18.9, >= 1.19.0, < 1.19.3 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 govulncheck-vulndb 0.0.20260723T184607-160000.1.1 openSUSE-SU-2026:21483-1

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling hubble-ui-backend 0.13.5-r1 —
Wolfi rolling kubescape 4.0.5-r3 —
Wolfi rolling kubescape-operator 0.2.140-r1 —

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/cilium/cilium < 1.17.15 1.17.15 GHSA-gj49-89wh-h4gj
Go github.com/cilium/cilium >= 1.18.0, < 1.18.9 1.18.9 GHSA-gj49-89wh-h4gj
Go github.com/cilium/cilium >= 1.19.0, < 1.19.3 1.19.3 GHSA-gj49-89wh-h4gj
Go github.com/cilium/cilium < 1.17.15 · >= 1.18.0, < 1.18.9 · >= 1.19.0, < 1.19.3 1.17.15, 1.18.9, 1.19.3 GO-2026-5400

Advisories 1

References