{"id":"CVE-2026-63308","revision":null,"records":[{"revision":"5c9d2bb6dcfe4dceafa13b06c8975d71","observedAt":"2026-10-29T22:48:55.035+00:00","statement":{"source":"cve-program","id":"CVE-2026-63308","aliases":[],"title":"Helm Files.Lines Denial of Service via Empty Chart Files","description":"Helm through 4.2.3, fixed in commit ba6c9a2, contains a denial of service vulnerability in the Files.Lines template helper in pkg/engine/files.go that allows attackers to trigger an index out of range panic by including zero-length byte slices in chart files. Attackers can include empty files in Helm charts to cause deterministic render failures across template, install, upgrade, lint, and SDK Engine.Render operations.","state":0,"publishedAt":"2026-07-17T16:14:15.472+00:00","modifiedAt":"2026-10-29T21:16:18.58+00:00","affected":[{"ecosystem":"Vendor product","name":"helm","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"helm\",\n                    \"product\": \"helm\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:golang/helm.sh/helm/v4\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"4.2.3\"\n                        },\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"ba6c9a29efa7bf9198dad6a5ec12b4fb30c96017\",\n                            \"versionType\": \"git\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/helm/helm\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","score":4.3,"severity":"MEDIUM"}],"references":["https://github.com/helm/helm/issues/32279","https://github.com/helm/helm/pull/32290","https://github.com/helm/helm/commit/ba6c9a29efa7bf9198dad6a5ec12b4fb30c96017","https://www.vulncheck.com/advisories/helm-files-lines-denial-of-service-via-empty-chart-files"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63308","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63308","identifiers":["CVE-2026-63308"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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