{"id":"CVE-2026-63308","summary":"Helm Files.Lines Denial of Service via Empty Chart Files","details":"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.","modified":"2026-07-19T03:47:18.773374783Z","published":"2026-07-17T16:14:15.472Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-129"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63308.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63308.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63308"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/chat2db-insecure-direct-object-reference-via-get-api-connection-datasource"},{"type":"REPORT","url":"https://github.com/helm/helm/pull/32290"},{"type":"FIX","url":"https://github.com/helm/helm/commit/ba6c9a29efa7bf9198dad6a5ec12b4fb30c96017"},{"type":"PACKAGE","url":"https://github.com/helm/helm"},{"type":"EVIDENCE","url":"https://github.com/helm/helm/issues/32279"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/helm/helm","events":[{"introduced":"0"},{"fixed":"43e8b7feece8beb0fcba47059ec9b522fd929a64"},{"fixed":"ba6c9a29efa7bf9198dad6a5ec12b4fb30c96017"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"4.2.3"}]}}],"versions":["v4.2.2","v4.2.1","v4.2.0-rc.1","v4.2.0","v4.1.0-rc.1","v4.1.0","v4.0.0-rc.1","v4.0.0","v4.0.0-beta.2","v4.0.0-beta.1","v4.0.0-alpha.1","v3.12.0-dev.1","v3.0.0-beta.5","v3.0.0-beta.4","v3.0.0-beta.3","v3.0.0-beta.2","v3.0.0-beta.1","v3.0.0-alpha.2","v3.0.0-alpha.1","v2.8.0-rc.1","v2.7.0","v2.7.0-rc1","v2.6.0","v2.5.0","v2.4.0","v2.3.0","v2.2.0","v2.1.0","v2.0.0","v2.0.0-rc.2","v2.0.0-rc.1","v2.0.0-beta.2","v2.0.0-beta.1","v2.0.0-alpha.5","v2.0.0-alpha.4","v2.0.0-alpha.2","v2.0.0-alpha.1","1.999.0","v1.2","v1.1","v1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63308.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}