CVE-2026-63308 — Helm Files.Lines Denial of Service via Empty Chart Files
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 trigge…
Published: 2026-07-17 · CVSS: 5.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7