{"id":"GHSA-gj49-89wh-h4gj","revision":null,"records":[{"revision":"02d2f3a121a347b4a10588d692cafaa3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-41520","aliases":[],"title":"Cillium exposes sensitive information included in the cilium-bugtool debug archive","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.","state":0,"publishedAt":"2026-05-08T22:01:08.394+00:00","modifiedAt":"2026-05-13T19:33:28.377+00:00","affected":[{"ecosystem":"Vendor product","name":"cilium","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"cilium\",\n                    \"product\": \"cilium\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.17.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 1.18.0, < 1.18.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 1.19.0, < 1.19.3\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N","score":7.9,"severity":"HIGH"}],"references":["https://github.com/cilium/cilium/security/advisories/GHSA-gj49-89wh-h4gj","https://github.com/cilium/cilium/releases/tag/v1.17.15","https://github.com/cilium/cilium/releases/tag/v1.18.9","https://github.com/cilium/cilium/releases/tag/v1.19.3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-41520","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-41520","identifiers":["CVE-2026-41520"]},"retained":false,"historicalAffected":[]},{"revision":"c7e65af6939e4b819d1d2c252b0aedc8","observedAt":"2026-11-13T15:59:56.21+00:00","statement":{"source":"euvd","id":"EUVD-2026-28845","aliases":["CVE-2026-41520","GHSA-gj49-89wh-h4gj"],"title":"Cilium is a networking, observability, and security solution with an eBPF-based dataplane. 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This issue has been patched in versions 1.17.15, 1.18.9, and 1.19.3.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N","score":7.9,"severity":null}],"references":["https://github.com/cilium/cilium/security/advisories/GHSA-gj49-89wh-h4gj","https://github.com/cilium/cilium/releases/tag/v1.17.15","https://github.com/cilium/cilium/releases/tag/v1.18.9","https://github.com/cilium/cilium/releases/tag/v1.19.3"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28845","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 8, 2026, 10:01:08 PM","dateUpdated":"May 13, 2026, 7:33:28 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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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.","state":0,"publishedAt":"2026-05-08T23:16:35.597+00:00","modifiedAt":"2026-11-11T20:10:00.273+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N","score":7.9,"severity":"HIGH"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","score":4.4,"severity":"MEDIUM"}],"references":["https://github.com/cilium/cilium/releases/tag/v1.17.15","https://github.com/cilium/cilium/releases/tag/v1.18.9","https://github.com/cilium/cilium/releases/tag/v1.19.3","https://github.com/cilium/cilium/security/advisories/GHSA-gj49-89wh-h4gj"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-41520","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-200","CWE-312"],"productCriteria":["cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-05-08T23:16:35.597","lastModified":"2026-11-11T20:10:00.273"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-41520","identifiers":["CVE-2026-41520"]},"retained":false,"historicalAffected":[]},{"revision":"531e01d8370a4f5081e61b5999b0aa53","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-gj49-89wh-h4gj","aliases":["BIT-cilium-2026-41520","BIT-cilium-operator-2026-41520","BIT-hubble-relay-2026-41520","CVE-2026-41520","GO-2026-5400"],"title":"Cillium exposes sensitive information included in the cilium-bugtool debug archive","description":"### Impact\nThe output of `cilium-bugtool` can contain sensitive data when the tool is run against Cilium deployments with WireGuard encryption enabled.\n\nUsers of [WireGuard Transparent Encryption](https://docs.cilium.io/en/stable/security/network/encryption-wireguard/) are affected.\nThe sensitive data is  the WireGuard private key (`cilium_wg0.key`) used for node-to-node encrypted communication\n\n`cilium-bugtool` is a debugging tool that is typically invoked manually and does not run during the normal operation of a Cilium cluster. It is also invoked when gathering sysdumps using the Cilium CLI's `cilium sysdump` command.\n\n### Patches\nThis issue affects:\n\n- Cilium v1.19 between v1.19.0 and v1.19.2 inclusive\n- Cilium v1.18 between v1.18.0 and v1.18.8 inclusive\n- All versions of Cilium prior to v1.17.15\n\nThis issue has been patched in:\n\n- Cilium v1.19.3\n- Cilium v1.18.9\n- Cilium v1.17.15\n\n\n### Workarounds\nThere is no workaround to this issue.\n\nUsers who have previously shared bugtool or sysdump archives from WireGuard-enabled nodes should rotate the WireGuard keys on the affected nodes. This can be done by deleting the key file and restarting the Cilium agent, which will generate a new key pair.\n\n### Acknowledgements\n\nThe Cilium community has worked together with members of Isovalent to prepare these mitigations. Cillium extends special thanks to @kodareef5  for reporting the issue and  @tklauser for their work on triaging and remediating this issue.\n\n### For more information\n\nIf there are any questions or comments about this advisory, please reach out on [Slack](https://docs.cilium.io/en/latest/community/community/).\n\nCilium strongly encourages the reporting of suspected vulnerabilities to the security mailing list at [security@cilium.io](mailto:security@cilium.io). This is a private mailing list for the Cilium security team, and the report will be treated as top priority.","state":0,"publishedAt":"2026-04-25T23:39:37+00:00","modifiedAt":"2026-09-10T03:51:01.7955103+00:00","affected":[{"ecosystem":"Go","name":"github.com/cilium/cilium","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.17.15"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/cilium/cilium","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"1.18.0"},{"kind":"fixed","version":"1.18.9"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/cilium/cilium","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"1.19.0"},{"kind":"fixed","version":"1.19.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/cilium/cilium/security/advisories/GHSA-gj49-89wh-h4gj","https://nvd.nist.gov/vuln/detail/CVE-2026-41520","https://github.com/cilium/cilium","https://github.com/cilium/cilium/releases/tag/v1.17.15","https://github.com/cilium/cilium/releases/tag/v1.18.9","https://github.com/cilium/cilium/releases/tag/v1.19.3","http://docs.cilium.io/en/stable/security/network/encryption-wireguard"],"sourceUrl":"https://github.com/advisories/GHSA-gj49-89wh-h4gj","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-gj49-89wh-h4gj","identifiers":["GHSA-gj49-89wh-h4gj","BIT-cilium-2026-41520","BIT-cilium-operator-2026-41520","BIT-hubble-relay-2026-41520","CVE-2026-41520","GO-2026-5400"]},"retained":false,"historicalAffected":[]},{"revision":"90201eec4fee4828a052cf620543d040","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5400","aliases":["BIT-cilium-2026-41520","BIT-cilium-operator-2026-41520","BIT-hubble-relay-2026-41520","CVE-2026-41520","GHSA-gj49-89wh-h4gj"],"title":"Cillium exposes sensitive information included in the cilium-bugtool debug archive in github.com/cilium/cilium","description":"Cillium exposes sensitive information included in the cilium-bugtool debug archive in github.com/cilium/cilium","state":0,"publishedAt":"2026-06-25T22:34:31+00:00","modifiedAt":"2026-06-25T23:11:14.7243277+00:00","affected":[{"ecosystem":"Go","name":"github.com/cilium/cilium","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.17.15"},{"kind":"introduced","version":"1.18.0"},{"kind":"fixed","version":"1.18.9"},{"kind":"introduced","version":"1.19.0"},{"kind":"fixed","version":"1.19.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/cilium/cilium/security/advisories/GHSA-gj49-89wh-h4gj","https://nvd.nist.gov/vuln/detail/CVE-2026-41520","http://docs.cilium.io/en/stable/security/network/encryption-wireguard","https://github.com/cilium/cilium/releases/tag/v1.17.15","https://github.com/cilium/cilium/releases/tag/v1.18.9","https://github.com/cilium/cilium/releases/tag/v1.19.3"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5400","license":"OSV · upstream source license applies","key":"osv:GO-2026-5400","identifiers":["GO-2026-5400","BIT-cilium-2026-41520","BIT-cilium-operator-2026-41520","BIT-hubble-relay-2026-41520","CVE-2026-41520","GHSA-gj49-89wh-h4gj"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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