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

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-41520
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 23:16:35 UTC
Updated2026-05-18 15:12:53 UTC
DescriptionCilium 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.

Risk And Classification

Primary CVSS: v3.1 4.4 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.000070000 probability, percentile 0.004400000 (date 2026-05-20)

Problem Types: CWE-200 | CWE-312 | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor | CWE-312 CWE-312: Cleartext Storage of Sensitive Information

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.4MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
3.1[email protected]Secondary7.9HIGHCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
3.1CNADECLARED7.9HIGHCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Cilium Cilium All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Cilium Cilium affected < 1.17.15 Not specified
CNA Cilium Cilium affected >= 1.18.0, < 1.18.9 Not specified
CNA Cilium Cilium affected >= 1.19.0, < 1.19.3 Not specified

References

ReferenceSourceLinkTags
github.com/cilium/cilium/releases/tag/v1.19.3 [email protected] github.com Product, Release Notes
github.com/cilium/cilium/releases/tag/v1.18.9 [email protected] github.com Product, Release Notes
github.com/cilium/cilium/security/advisories/GHSA-gj49-89wh-h4gj [email protected] github.com Mitigation, Vendor Advisory
github.com/cilium/cilium/releases/tag/v1.17.15 [email protected] github.com Product, Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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